Academic literature on the topic 'Poly(amino-L-tyrosine)'

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Journal articles on the topic "Poly(amino-L-tyrosine)"

1

Gupta, Anirban Sen, and Stephanie T. Lopina. "L-Tyrosine-based backbone-modified poly(amino acids)." Journal of Biomaterials Science, Polymer Edition 13, no. 10 (2002): 1093–104. http://dx.doi.org/10.1163/156856202320813819.

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2

Skoulas, Dimitrios, Muireann Fallon, Katelyn J. Genoud, Fergal J. O’Brien, Deirdre Fitzgerald Hughes, and Andreas Heise. "Shear-Thinning Extrudable Hydrogels Based on Star Polypeptides with Antimicrobial Properties." Gels 10, no. 10 (2024): 652. http://dx.doi.org/10.3390/gels10100652.

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Hydrogels with low toxicity, antimicrobial potency and shear-thinning behavior are promising materials to combat the modern challenges of increased infections. Here, we report on 8-arm star block copolypeptides based on poly(L-lysine), poly(L-tyrosine) and poly(S-benzyl-L-cysteine) blocks. Three star block copolypeptides were synthesized with poly(S-benzyl-L-cysteine) always forming the outer block. The inner block comprised either two individual blocks of poly(L-lysine) and poly(L-tyrosine) or a statistical block copolypeptide from both amino acids. The star block copolypeptides were synthesi
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3

Masař, Bohumil, Pavel Schmidt, Hana Pivcová та Pavel Čefelín. "α-Aminoacyl derivatives of α,ω-diaminopoly(oxyethylene)". Collection of Czechoslovak Chemical Communications 52, № 8 (1987): 1922–27. http://dx.doi.org/10.1135/cccc19871922.

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By reacting p-nitrophenyl esters of L-α-amino acids with α-(3-aminopropyl)-ω-(aminomethyl)-poly(oxyethylene), diamides having the structure [X-NHCH(R)CONH]2Mx' were prepared, X being the protective group Boc or Z, R being residues of glutamic and aspartic acid, phenylalanine and tyrosine, and Mx' being the poly(oxyethylene) chain with the (-CH2)3- and -CH2- endgroups. The diamides were characterized by IR and 1H NMR spectroscopy and thin-layer chromatography. After complete removal of tert-butyloxycarbonyl groups from diamides (X = Boc), deprotected α-aminoacyl derivatives were characterized a
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4

Hubler, L., P. S. Leventhal, and P. J. Bertics. "Alteration of the kinetic properties of the epidermal growth factor receptor tyrosine kinase by basic proteins." Biochemical Journal 281, no. 1 (1992): 107–14. http://dx.doi.org/10.1042/bj2810107.

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Previous studies have shown that lysine- and arginine-rich proteins can enhance the activity of tyrosine and serine/threonine protein kinases. However, the kinetics and mechanism of this activation are not fully understood. Therefore we investigated the ability of poly(amino acids) and the arginine-rich protein, protamine, to alter the kinetic properties of epidermal growth factor (EGF) receptor protein-tyrosine kinase activity using immunoaffinity-purified receptor isolated from human epidermoid carcinoma (A431) cells. Poly(L-lysine), poly(L-arginine) and protamine stimulated EGF receptor kin
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5

Bourke, Sharon L., and Joachim Kohn. "Polymers derived from the amino acid l-tyrosine: polycarbonates, polyarylates and copolymers with poly(ethylene glycol)." Advanced Drug Delivery Reviews 55, no. 4 (2003): 447–66. http://dx.doi.org/10.1016/s0169-409x(03)00038-3.

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6

Mallakpour, Shadpour, Amir Abdolmaleki, and Sedigheh Borandeh. "Fabrication of amino acid-based graphene-zinc oxide (ZnO) hybrid and its application for poly(ester–amide)/graphene-ZnO nanocomposite synthesis." Journal of Thermoplastic Composite Materials 30, no. 3 (2016): 358–80. http://dx.doi.org/10.1177/0892705715598365.

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Graphene/zinc oxide (ZnO) hybrid was prepared using biosafe l-phenylalanine-functionalized graphene. In this regard, ZnO nanoparticles (NPs) were modified by γ-aminopropyltriethoxyl silane (KH550) and were covalently attached to functionalized graphene sheets by reaction of amino groups on the outer wall of ZnO NPs with the carboxyl groups existing on graphene surface. Microscopic analysis of resulted hybrid revealed good dispersion of ZnO NPs on the graphene sheets. Afterward, the prepared hybrid was used as a filler for fabrication of polymer nanocomposite (NC). To this aim, a novel opticall
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7

Trojanek, Joanna B., Maria M. Klimecka, Anna Fraser, Grazyna Dobrowolska, and Grazyna Muszyńska. "Characterization of dual specificity protein kinase from maize seedlings." Acta Biochimica Polonica 51, no. 3 (2004): 635–47. http://dx.doi.org/10.18388/abp.2004_3549.

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A protein kinase of 57 kDa, able to phosphorylate tyrosine in synthetic substrates pol(Glu4,Tyr1) and a fragment of Src tyrosine kinase, was isolated and partly purified from maize seedlings (Zea mays). The protein kinase was able to phosphorylate exogenous proteins: enolase, caseins, histones and myelin basic protein. Amino acid analysis of phosphorylated casein and enolase, as well as of phosphorylated endogenous proteins, showed that both Tyr and Ser residues were phosphorylated. Phosphotyrosine was also immunodetected in the 57 kDa protein fraction. In the protein fraction there are presen
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8

Mallakpour, S., F. Zeraatpisheh, and M. R. Sabzalian. "Sonochemical-assisted fabrication of biologically active chiral poly(ester-imide)/TiO2 bionanocomposites derived from L-methionine and L-tyrosine amino acids." Express Polymer Letters 5, no. 9 (2011): 825–37. http://dx.doi.org/10.3144/expresspolymlett.2011.81.

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9

Santander, Sebastián, Nicolás Padilla-Manzano, Bastián Díaz, et al. "Wettability of Amino Acid-Functionalized PSMA Electrospun Fibers for the Modulated Release of Active Agents and Its Effect on Their Bioactivity." Pharmaceutics 15, no. 6 (2023): 1659. http://dx.doi.org/10.3390/pharmaceutics15061659.

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The ideal treatment for chronic wounds is based on the use of bioactive dressings capable of releasing active agents. However, the control of the rate at which these active agents are released is still a challenge. Bioactive polymeric fiber mats of poly(styrene-co-maleic anhydride) [PSMA] functionalized with amino acids of different hydropathic indices and L-glutamine, L-phenylalanine and L-tyrosine levels allowed obtaining derivatives of the copolymers named PSMA@Gln, PSMA@Phe and PSMA@Tyr, respectively, with the aim of modulating the wettability of the mats. The bioactive characteristics of
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10

Abdolmaleki, Amir, Shadpour Mallakpour, and Sedigheh Borandeh. "Amino acid-functionalized multi-walled carbon nanotubes for improving compatibility with chiral poly(amide-ester-imide) containing l-phenylalanine and l-tyrosine linkages." Applied Surface Science 287 (December 2013): 117–23. http://dx.doi.org/10.1016/j.apsusc.2013.09.088.

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