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Journal articles on the topic 'Mutation (Biology) Bacteriophage Lambda'

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Published: 4 June 2021

Last updated: 12 February 2022

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1

Poteete, Anthony R., Hsinju R. Wang та Patricia L. Foster. "Phage λ Red-Mediated Adaptive Mutation". Journal of Bacteriology 184, № 13 (2002): 3753–55. http://dx.doi.org/10.1128/jb.184.13.3753-3755.2002.

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ABSTRACT Replacement of the recBCD genes of Escherichia coli with the red recombination genes of bacteriophage lambda results in a strain in which adaptive mutation occurs at an elevated frequency. Like RecBCD-dependent adaptive mutation, Red-mediated adaptive mutation is dependent upon recA and ruvABC functions.

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2

Raab, R., G. Neal, J. Garrett, R. Grimaila, R. Fusselman, and R. Young. "Mutational analysis of bacteriophage lambda lysis gene S." Journal of Bacteriology 167, no. 3 (1986): 1035–42. http://dx.doi.org/10.1128/jb.167.3.1035-1042.1986.

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3

Leffers, Gerald G., and Susan Gottesman. "Lambda Xis Degradation In Vivo by Lon and FtsH." Journal of Bacteriology 180, no. 6 (1998): 1573–77. http://dx.doi.org/10.1128/jb.180.6.1573-1577.1998.

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ABSTRACT Lambda Xis, which is required for site-specific excision of phage lambda from the bacterial chromosome, has a much shorter functional half-life than Int, which is required for both integration and excision (R. A. Weisberg and M. E. Gottesman, p. 489–500,in A. D. Hershey, ed., The Bacteriophage Lambda, 1971). We found that Xis is degraded in vivo by two ATP-dependent proteases, Lon and FtsH (HflB). Xis was stabilized two- to threefold more than in the wild type in a lon mutant and as much as sixfold more in a lon ftsH double mutant at the nonpermissive temperature for the ftsH mutation

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4

Gimble, F. S., and R. T. Sauer. "Mutations in bacteriophage lambda repressor that prevent RecA-mediated cleavage." Journal of Bacteriology 162, no. 1 (1985): 147–54. http://dx.doi.org/10.1128/jb.162.1.147-154.1985.

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5

Rydman, Pia S., and Dennis H. Bamford. "Identification and Mutational Analysis of Bacteriophage PRD1 Holin Protein P35." Journal of Bacteriology 185, no. 13 (2003): 3795–803. http://dx.doi.org/10.1128/jb.185.13.3795-3803.2003.

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ABSTRACT Holin proteins are phage-induced integral membrane proteins which regulate the access of lytic enzymes to host cell peptidoglycan at the time of release of progeny viruses by host cell lysis. We describe the identification of the membrane-containing phage PRD1 holin gene (gene XXXV). The PRD1 holin protein (P35, 12.8 kDa) acts similarly to its functional counterpart from phage lambda (gene S), and the defect in PRD1 gene XXXV can be corrected by the presence of gene S of lambda. Several nonsense, missense, and insertion mutations in PRD1 gene XXXV were analyzed. These studies support

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6

Sippy, J., and M. Feiss. "Analysis of a mutation affecting the specificity domain for prohead binding of the bacteriophage lambda terminase." Journal of Bacteriology 174, no. 3 (1992): 850–56. http://dx.doi.org/10.1128/jb.174.3.850-856.1992.

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7

Davidson, A., P. Yau, H. Murialdo, and M. Gold. "Isolation and characterization of mutations in the bacteriophage lambda terminase genes." Journal of Bacteriology 173, no. 16 (1991): 5086–96. http://dx.doi.org/10.1128/jb.173.16.5086-5096.1991.

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8

Bauer, Carl E., Steven D. Hesse, Richard I. Gumport, and Jeffrey F. Gardner. "Mutational analysis of integrase arm-type binding sites of bacteriophage lambda." Journal of Molecular Biology 192, no. 3 (1986): 513–27. http://dx.doi.org/10.1016/0022-2836(86)90273-1.

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9

Hayes, Sidney, and Roderick A. Slavcev. "Polarity withinpMandpEpromoted phage lambdacI-rexA-rexBtranscription and its suppression." Canadian Journal of Microbiology 51, no. 1 (2005): 37–49. http://dx.doi.org/10.1139/w04-115.

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The cI-rexA-rexB operon of bacteriophage λ confers 2 phenotypes, Imm and Rex, to lysogenic cells. Immunity to homoimmune infecting λ phage depends upon the CI repressor. Rex exclusion of T4rII mutants requires RexA and RexB proteins. Both Imm and Rex share temperature-sensitive conditional phenotypes when expressed from cI[Ts]857 but not from cI+λ prophage. Plasmids were made in which cI-rexA-rexB was transcribed from a non-lambda promoter, pTet. The cI857-rexA-rexB plasmid exhibited Ts conditional Rex and CI phenotypes; the cI+-rexA-rexB plasmid did not. Polarity was observed within cI-rexA-r

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10

Kuchanny, D., G. Klein, J. Krzewska, A. Czyz, and B. Lipińska. "Cloning of the groE operon of the marine bacterium Vibrio harveyi using a lambda vector." Acta Biochimica Polonica 45, no. 1 (1998): 261–70. http://dx.doi.org/10.18388/abp.1998_4341.

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groES and groEL genes encode two co-operating proteins GroES and GroEL, belonging to a class of chaperone proteins highly conserved during evolution. The GroE chaperones are indispensable for the growth of bacteriophage lambda in Escherichia coli cells. In order to clone the groEL and groES genes of the marine bacterium Vibrio harveyi, we constructed the V. harveyi genomic library in the lambdaEMBL1 vector, and selected clones which were able to complement mutations in both groE genes of E. coli for bacteriophage lambda growth. Using Southern hybridization, in one of these clones we identified

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11

Cho, Eun Hee, Renato Alcaraz, Richard I. Gumport, and Jeffrey F. Gardner. "Characterization of Bacteriophage Lambda Excisionase Mutants Defective in DNA Binding." Journal of Bacteriology 182, no. 20 (2000): 5807–12. http://dx.doi.org/10.1128/jb.182.20.5807-5812.2000.

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ABSTRACT The bacteriophage λ excisionase (Xis) is a sequence-specific DNA binding protein required for excisive recombination. Xis binds cooperatively to two DNA sites arranged as direct repeats on the phage DNA. Efficient excision is achieved through a cooperative interaction between Xis and the host-encoded factor for inversion stimulation as well as a cooperative interaction between Xis and integrase. The secondary structure of the Xis protein was predicted to contain a typical amphipathic helix that spans residues 18 to 28. Several mutants, defective in promoting excision in vivo, were iso

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12

Costantino, N., M. Zuber, and D. Court. "Analysis of mutations in the ninR region of bacteriophage lambda that bypass a requirement for lambda N antitermination." Journal of Bacteriology 172, no. 8 (1990): 4610–15. http://dx.doi.org/10.1128/jb.172.8.4610-4615.1990.

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13

Oviedo de Anda, Norma Angélica, Luis Kameyama, José Manuel Galindo, Gabriel Guarneros, and Javier Hernandez-Sanchez. "Evidence of bar Minigene Expression and tRNA2IleSequestration as Peptidyl-tRNA2Ileduring Lambda Bacteriophage Development." Journal of Bacteriology 186, no. 16 (2004): 5533–37. http://dx.doi.org/10.1128/jb.186.16.5533-5537.2004.

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ABSTRACT Lambda bacteriophage development is impaired in Escherichia coli cells defective for peptidyl (pep)-tRNA hydrolase (Pth). Single-base-pair mutations (bar −) that affect translatable two-codon open reading frames named bar minigenes (barI or barII) in the lambda phage genome promote the development of this phage in Pth-defective cells (rap cells). When the barI minigene is cloned and overexpressed from a plasmid, it inhibits protein synthesis and cell growth in rap cells by sequestering \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts}

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14

Dai, D. X., and E. E. Ishiguro. "Complementation of the lytD1 mutation of Escherichia coli by either the cI or cro gene of bacteriophage lambda." Journal of Bacteriology 173, no. 2 (1991): 893–95. http://dx.doi.org/10.1128/jb.173.2.893-895.1991.

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15

Johnson-Boaz, Rebecca, Chung-Yu Chang, and Ry Young. "A dominant mutation in the bacteriophage lambda S gene causes premature lysis and an absolute defective plating phenotype." Molecular Microbiology 13, no. 3 (1994): 495–504. http://dx.doi.org/10.1111/j.1365-2958.1994.tb00444.x.

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16

Nakamura, Yoshikazu, Saeko Mizusawa, Akiko Tsugawa, and Mutsuo Imai. "Conditionally lethal nusAts mutation of Escherichia coli reduces transcription termination but does not affect antitermination of bacteriophage lambda." Molecular and General Genetics MGG 204, no. 1 (1986): 24–28. http://dx.doi.org/10.1007/bf00330182.

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17

Gabig, M., M. Obuchowski, A. Ciesielska, et al. "The Escherichia coli RNA polymerase alpha subunit and transcriptional activation by bacteriophage lambda CII protein." Acta Biochimica Polonica 45, no. 1 (1998): 271–80. http://dx.doi.org/10.18388/abp.1998_4342.

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Bacteriophage lambda is not able to lysogenise the Escherichia coli rpoA341 mutant. This mutation causes a single amino acid substitution Lys271Glu in the C-terminal domain of the RNA polymerase alpha subunit (alphaCTD). Our previous studies indicated that the impaired lysogenisation of the rpoA341 host is due to a defect in transcriptional activation by the phage CII protein and suggested a role for alphaCTD in this process. Here we used a series of truncation and point mutants in the rpoA gene placed on a plasmid to investigate the process of transcriptional activation by the cII gene produc

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18

Christie, Gail E., Louise M. Temple, Becky A. Bartlett, and Tina S. Goodwin. "Programmed Translational Frameshift in the Bacteriophage P2 FETUD Tail Gene Operon." Journal of Bacteriology 184, no. 23 (2002): 6522–31. http://dx.doi.org/10.1128/jb.184.23.6522-6531.2002.

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ABSTRACT The major structural components of the P2 contractile tail are encoded in the FETUD tail gene operon. The sequences of genes F I and F II, encoding the major tail sheath and tail tube proteins, have been reported previously (L. M. Temple, S. L. Forsburg, R. Calendar, and G. E. Christie, Virology 181:353-358, 1991). Sequence analysis of the remainder of this operon and the locations of amber mutations Eam30, Tam5, Tam64, Tam215, Uam25, Uam77, Uam92, and Dam6 and missense mutation Ets55 identified the coding regions for genes E, T, U, and D, completing the sequence determination of the

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19

Arens, Jean Sippy, Qi Hang, Young Hwang, Bill Tuma, Sara Max та Mike Feiss. "Mutations That Extend the Specificity of the Endonuclease Activity of λ Terminase". Journal of Bacteriology 181, № 1 (1999): 218–24. http://dx.doi.org/10.1128/jb.181.1.218-224.1999.

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ABSTRACT Terminase, an enzyme encoded by the Nu1 andA genes of bacteriophage lambda, is crucial for packaging concatemeric DNA into virions. cosN, a 22-bp segment, is the site on the virus chromosome where terminase introduces staggered nicks to cut the concatemer to generate unit-length virion chromosomes. Although cosN is rotationally symmetric, mutations incosN have asymmetric effects. The cosNG2C mutation (a G-to-C change at position 2) in the left half of cosN reduces the phage yield 10-fold, whereas the symmetric mutation cosN C11G, in the right half of cosN, does not affect the burst si

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20

Montañez, Cecilia, José Bueno, Ursula Schmeissner, Donald L. Court, and Gabriel Guarneros. "Mutations of bacteriophage lambda that define independent but overlapping RNA processing and transcription termination sites." Journal of Molecular Biology 191, no. 1 (1986): 29–37. http://dx.doi.org/10.1016/0022-2836(86)90420-1.

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21

Zeilstra-Ryalls, J., O. Fayet, L. Baird, and C. Georgopoulos. "Sequence analysis and phenotypic characterization of groEL mutations that block lambda and T4 bacteriophage growth." Journal of Bacteriology 175, no. 4 (1993): 1134–43. http://dx.doi.org/10.1128/jb.175.4.1134-1143.1993.

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22

MacWilliams, M., R. I. Gumport, and J. F. Gardner. "Mutational analysis of protein binding sites involved in formation of the bacteriophage lambda attL complex." Journal of bacteriology 179, no. 4 (1997): 1059–67. http://dx.doi.org/10.1128/jb.179.4.1059-1067.1997.

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23

Werts, C., V. Michel, M. Hofnung, and A. Charbit. "Adsorption of bacteriophage lambda on the LamB protein of Escherichia coli K-12: point mutations in gene J of lambda responsible for extended host range." Journal of Bacteriology 176, no. 4 (1994): 941–47. http://dx.doi.org/10.1128/jb.176.4.941-947.1994.

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24

Strauch, M. A., M. Baumann, D. I. Friedman, and L. S. Baron. "Identification and characterization of mutations in Escherichia coli that selectively influence the growth of hybrid lambda bacteriophages carrying the immunity region of bacteriophage P22." Journal of Bacteriology 167, no. 1 (1986): 191–200. http://dx.doi.org/10.1128/jb.167.1.191-200.1986.

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25

Martín, Ana C., Rubens López, and Pedro García. "Functional Analysis of the Two-Gene Lysis System of the Pneumococcal Phage Cp-1 in Homologous and Heterologous Host Cells." Journal of Bacteriology 180, no. 2 (1998): 210–17. http://dx.doi.org/10.1128/jb.180.2.210-217.1998.

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ABSTRACT The two lysis genes cph1 and cpl1 of theStreptococcus pneumoniae bacteriophage Cp-1 coding for holin and lysozyme, respectively, have been cloned and expressed inEscherichia coli. Synthesis of the Cph1 holin resulted in bacterial cell death but not lysis. The cph1 gene was able to complement a lambda Sam mutation in the nonsuppressingE. coli HB101 strain to produce phage progeny, suggesting that the holins encoded by both phage genes have analogous functions and that the pneumococcal holin induces a nonspecific lesion in the cytoplasmic membrane. Concomitant expression of both holin a

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26

Zhou, Yanning, and Susan Gottesman. "Regulation of Proteolysis of the Stationary-Phase Sigma Factor RpoS." Journal of Bacteriology 180, no. 5 (1998): 1154–58. http://dx.doi.org/10.1128/jb.180.5.1154-1158.1998.

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ABSTRACT RpoS, the stationary-phase sigma factor of Escherichia coli, is responsible for increased transcription of an array of genes when cells enter stationary phase and under certain stress conditions. RpoS is rapidly degraded during exponential phase and much more slowly during stationary phase; the resulting changes in RpoS accumulation play an important role in providing differential expression of RpoS-dependent gene expression. It has previously been shown that rapid degradation of RpoS during exponential growth depends on RssB (also called SprE and MviA), a protein with homology to the

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27

Cai, Z. H., Y. Hwang, D. Cue, C. Catalano, and M. Feiss. "Mutations in Nu1, the gene encoding the small subunit of bacteriophage lambda terminase, suppress the postcleavage DNA packaging defect of cosB mutations." Journal of bacteriology 179, no. 8 (1997): 2479–85. http://dx.doi.org/10.1128/jb.179.8.2479-2485.1997.

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28

Mariol, M. C., T. Preat, and B. Limbourg-Bouchon. "Molecular cloning of fused, a gene required for normal segmentation in the Drosophila melanogaster embryo." Molecular and Cellular Biology 7, no. 9 (1987): 3244–51. http://dx.doi.org/10.1128/mcb.7.9.3244-3251.1987.

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Using the chromosomal walk technique, we isolated recombinant lambda bacteriophage and cosmid clones spanning 250 kilobases (kb) in the 17C-D region of the X chromosome of Drosophila melanogaster. This region was known to contain the segment polarity gene fused. Several lethal fused mutations were used to define more precisely the localization of this locus. Southern analysis of genomic DNA revealed that all of them were relatively large deficiencies, the smallest one being 40 kb long. None of the 12 viable fused mutations examined possessed detectable alterations. We isolated a cosmid contain

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29

Jana, Nandan Kumar, Siddhartha Roy, Bhabatarak Bhattacharyya, and Nitai Chandra Mandal. "Amino acid changes in the repressor of bacteriophage lambda due to temperature-sensitive mutations in its cI gene and the structure of a highly temperature-sensitive mutant repressor." Protein Engineering, Design and Selection 12, no. 3 (1999): 225–33. http://dx.doi.org/10.1093/protein/12.3.225.

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30

Steensma, H. Y., J. C. Crowley, and D. B. Kaback. "Molecular cloning of chromosome I DNA from Saccharomyces cerevisiae: isolation and analysis of the CEN1-ADE1-CDC15 region." Molecular and Cellular Biology 7, no. 1 (1987): 410–19. http://dx.doi.org/10.1128/mcb.7.1.410-419.1987.

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To continue the systematic examination of the physical and genetic organization of an entire Saccharomyces cerevisiae chromosome, the DNA from the CEN1-ADE1-CDC15 region from chromosome I was isolated and characterized. Starting with the previously cloned ADE1 gene (J. C. Crowley and D. B. Kaback, J. Bacteriol. 159:413-417, 1984), a series of recombinant lambda bacteriophages containing 82 kilobases of contiguous DNA from chromosome I were obtained by overlap hybridization. The cloned sequences were mapped with restriction endonucleases and oriented with respect to the genetic map by determini

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31

Becker, A., H. Murialdo, H. Lucko, and J. Morell. "Bacteriophage lambda DNA packaging." Journal of Molecular Biology 199, no. 4 (1988): 597–607. http://dx.doi.org/10.1016/0022-2836(88)90304-x.

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32

Pearson, R. K., and M. S. Fox. "Effects of DNA heterologies on bacteriophage lambda recombination." Genetics 118, no. 1 (1988): 13–19. http://dx.doi.org/10.1093/genetics/118.1.13.

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Abstract Previous studies of bacteriophage lambda recombination have provided indirect evidence that substantial sequence nonhomologies, such as insertions and deletions, may be included in regions of heteroduplex DNA. However, the direct products of heterology-containing heteroduplex DNA--heterozygous progeny phage--have not been observed. We have constructed a series of small insertion and deletion mutations in the cI gene to examine the possibility that small heterologies might be accommodated in heterozygous progeny phage. Genetic crosses were carried out between lambda cI- Oam29 and lambd

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33

Patterson, Thomas A., Zhaoshan Zhang, Teresa Baker, Linda L. Johnson, David I. Friedman, and Donald L. Court. "Bacteriophage Lambda N-Dependent Transcription Antitermination." Journal of Molecular Biology 236, no. 1 (1994): 217–28. http://dx.doi.org/10.1006/jmbi.1994.1131.

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34

Christensen, Alan C. "Bacteriophage Lambda-Based Expression Vectors." Molecular Biotechnology 17, no. 3 (2001): 219–24. http://dx.doi.org/10.1385/mb:17:3:219.

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35

Parris, W., A. Davidson, C. L. Keeler, and M. Gold. "The Nu1 subunit of bacteriophage lambda terminase." Journal of Biological Chemistry 263, no. 17 (1988): 8413–19. http://dx.doi.org/10.1016/s0021-9258(18)68493-5.

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36

Campbell, Allan M. "Bacteriophage lambda as a model system." BioEssays 5, no. 6 (1986): 277–80. http://dx.doi.org/10.1002/bies.950050611.

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37

Sergueev, Kirill, Donald Court, Lucretia Reaves, and Stuart Austin. "E.coli Cell-cycle Regulation by Bacteriophage Lambda." Journal of Molecular Biology 324, no. 2 (2002): 297–307. http://dx.doi.org/10.1016/s0022-2836(02)01037-9.

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38

Kypr, Jaroslav, and Jan Mrázek. "Pseudogene in the genome of bacteriophage lambda?" Biochemical and Biophysical Research Communications 145, no. 1 (1987): 330–35. http://dx.doi.org/10.1016/0006-291x(87)91325-8.

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39

Dokland, Terje, and Helios Murialdo. "Structural Transitions During Maturation of Bacteriophage Lambda Capsids." Journal of Molecular Biology 233, no. 4 (1993): 682–94. http://dx.doi.org/10.1006/jmbi.1993.1545.

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40

Catalano, Carlos E. "Bacteriophage lambda: The path from biology to theranostic agent." Wiley Interdisciplinary Reviews: Nanomedicine and Nanobiotechnology 10, no. 5 (2018): e1517. http://dx.doi.org/10.1002/wnan.1517.

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41

Stephenson, Frank H., and W. Paul Diehl. "Rearrangements between the operators in the bacteriophage lambda." Molecular and General Genetics MGG 201, no. 1 (1985): 107–14. http://dx.doi.org/10.1007/bf00397994.

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42

Becker, A., and H. Murialdo. "Bacteriophage lambda DNA: the beginning of the end." Journal of Bacteriology 172, no. 6 (1990): 2819–24. http://dx.doi.org/10.1128/jb.172.6.2819-2824.1990.

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43

Guzmán, P., and G. Guarneros. "Phage genetic sites involved in lambda growth inhibition by the Escherichia coli rap mutant." Genetics 121, no. 3 (1989): 401–9. http://dx.doi.org/10.1093/genetics/121.3.401.

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Abstract The rap mutation of Escherichia coli prevents the growth of bacteriophage lambda. We have isolated phage mutants that compensate for the host deficiency. The mutations, named bar, were genetically located to three different loci of the lambda genome: barI in the attP site, barII in the cIII ea10 region, and barIII within or very near the imm434 region. The level of lambda leftward transcription correlates with rap exclusion. Phage lambda mutants partially defective in the pL promoter or in pL-transcript antitermination showed a Bar- phenotype. Conversely, mutants constitutive for tran

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44

Russell, R. R. B., P. Morrissey, and G. Dougan. "Cloning of sucrase genes fromStreptococcus mutansin bacteriophage lambda." FEMS Microbiology Letters 30, no. 1-2 (1985): 37–41. http://dx.doi.org/10.1111/j.1574-6968.1985.tb00981.x.

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45

Appasani, Krishnarao, David S. Thaler, and Edward B. Goldberg. "Bacteriophage T4 gp2 Interferes with Cell Viability and with Bacteriophage Lambda Red Recombination." Journal of Bacteriology 181, no. 4 (1999): 1352–55. http://dx.doi.org/10.1128/jb.181.4.1352-1355.1999.

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ABSTRACT The T4 head protein, gp2, promotes head-tail joining during phage morphogenesis and is also incorporated into the phage head. It protects the injected DNA from degradation by exonuclease V during the subsequent infection. In this study, we show that recombinant gp2, a very basic protein, rapidly kills the cells in which it is expressed. To further illustrate the protectiveness of gp2 for DNA termini, we compare the effect of gp2 expression on Red-mediated and Int-mediated recombination. Red-mediated recombination is nonspecific and requires the transient formation of double-stranded D

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46

Han, Yiping W., Richard I. Gumport, and Jeffrey F. Gardner. "Mapping the Functional Domains of Bacteriophage Lambda Integrase Protein." Journal of Molecular Biology 235, no. 3 (1994): 908–25. http://dx.doi.org/10.1006/jmbi.1994.1048.

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47

Gupta, Amita, Masanori Onda, Ira Pastan, Sankar Adhya, and Vijay K. Chaudhary. "High-density Functional Display of Proteins on Bacteriophage Lambda." Journal of Molecular Biology 334, no. 2 (2003): 241–54. http://dx.doi.org/10.1016/j.jmb.2003.09.033.

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48

Das, Tapas, and N. C. Mandal. "Structure and function of the repressor of bacteriophage lambda." Molecular and General Genetics MGG 204, no. 3 (1986): 540–42. http://dx.doi.org/10.1007/bf00331037.

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49

Esposito, Dominic, та Gary F. Gerard. "The Escherichia coli Fis Protein Stimulates Bacteriophage λ Integrative Recombination In Vitro". Journal of Bacteriology 185, № 10 (2003): 3076–80. http://dx.doi.org/10.1128/jb.185.10.3076-3080.2003.

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ABSTRACT The Escherichia coli nucleoid-associated protein Fis was previously shown to be involved in bacteriophage lambda site-specific recombination in vivo, enhancing the levels of both integrative recombination and excisive recombination. While purified Fis protein was shown to stimulate in vitro excision, Fis appeared to have no effect on in vitro integration reactions even though a 15-fold drop in lysogenization frequency had previously been observed in fis mutants. We demonstrate here that E. coli Fis protein does stimulate integrative lambda recombination in vitro but only under specifi

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50

Okayama, H., and P. Berg. "Bacteriophage lambda vector for transducing a cDNA clone library into mammalian cells." Molecular and Cellular Biology 5, no. 5 (1985): 1136–42. http://dx.doi.org/10.1128/mcb.5.5.1136-1142.1985.

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We have developed a bacteriophage lambda vector (lambda NMT) that permits efficient transduction of mammalian cells with a cDNA clone library constructed with the pcD expression vector (H. Okayama and P. Berg, Mol. Cell. Biol. 3:280-289, 1983). The phage vector contains a bacterial gene (neo) fused to the simian virus 40 early-region promoter and RNA processing signals, providing a dominant-acting selectable marker for mammalian transformation. The phage DNA can accommodate pcD-cDNA recombinants with cDNA of up to about 9 kilobases without impairing the ability of the phage DNA to be packaged

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