نتایج جستجو برای: poly l lysine

تعداد نتایج: 712038  

2012
Natalia Yevlampieva Olga Nazarova Olga Okatova Hervé Cottet

The four first generations of dendrigraft poly-L-lysine have been studied in dimethylformamide (aprotic solvent) and in 0.2 M NaCl aqueous solutions by isothermal translation diffusion, H NMR and viscometry methods. The relationships between diffusion coefficient, intrinsic viscosity and molar mass have been determined for dendrigraft poly-L-lysines, and the scaling index values have been compa...

Journal: :Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism 1997
H Kinoshita Z S Katusic

Cationic polypeptides are released by activated leukocytes and may play an important role in the regulation of vascular tone. Effects of cationic polypeptides on cerebral vascular tone have not been studied. The present experiments were designed to determine if synthetic cationic polypeptides, poly-L-arginine and poly-L-lysine, affect the function of cerebral arteries. Rings of canine basilar a...

Journal: :Einstein 2012
Tatiana Taís Sibov Liza Aya Mabuchi Miyaki Javier Bustamante Mamani Luciana Cavalheiro Marti Luiz Roberto Sardinha Lorena Favaro Pavon Daniela Mara de Oliveira Walter Humberto Cardenas Lionel Fernel Gamarra

OBJECTIVE The objective of this study was to evaluate the effect of the labeling of umbilical cord vein derived mesenchymal stem cells with superparamagnetic iron oxide nanoparticles coated with dextran and complexed to a non-viral transfector agent transfector poly-L-lysine. METHODS The labeling of mesenchymal stem cells was performed using the superparamagnetic iron oxide nanoparticles/dext...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1989
Y Fujita-Yamaguchi S Kathuria Q Y Xu J M McDonald H Nakano T Kamata

We have investigated the in vitro tyrosine phosphorylation of the HRAS and KRAS proteins by human placental insulin receptor kinase. Purified HRAS proteins are not phosphorylated by purified insulin receptor kinase. Since the tyrosine phosphorylation of calmodulin by the insulin receptor kinase in vitro requires cofactors such as protamine and poly(L-lysine), we examined the possibility that po...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1964
P B SIGLER H C SKINNER C L COULTER J KALLOS H BRAXTON D R DAVIES

The author would like to express his appreciation to Professor Ephraim Katchalski for his hospitality, to Professor Michael Sela for samples from his collection and for valuable discussion, to Professor Franz Sondheimer for the use of a spectrophotometer, and to Dr. Israel Schechter and Mr. Shmuel Shaltiel for valuable advice. Abbreviations used are: pTR, poly-L-tyrosyl ribonuclease; pApTR-L, l...

2002
E. P. Ivanova D. K. Pham Dan V. Nicolau Abraham P. Lee

The immobilization efficiency of the complexes of oligonucleotide/poly(L-lysine) onto Poly(Styrene/Maleic Acid), PSMA, and Poly(Styrene/Maleic Anhydride), PSMAA, has been investigated using X-ray photoelectron spectroscopy and atomic force microscopy (AFM) in conjugation with fluorescence-based measurements of DNA attachment. A mono-molecularly thin layer of either electrostatically or covalent...

Journal: :The Journal of Experimental Medicine 1964
Bernard B. Levine Baruj Benacerraf

The enzymatic degradation of fluorescein conjugates of poly-L-lysine, poly-D-lysine, and exhaustively succinylated poly-L-lysine by aqueous extracts of spleens from "responder" (guinea pigs which can develop immune responses to hapten-poly-L-lysine conjugates) and "non-responder" guinea pigs was investigated. The in vivo degradation of H(3)-tagged dinitrophenyl conjugates of these synthetic pol...

Journal: :Biochemical pharmacology 1991
J J McGuire W E Bolanowska J K Coward R F Sherwood C A Russell D M Felschow

on the B-helix transition of poly-L-lysine in sodium 18. Watanabe S and Saito T, A CD study of the role of dodecyl sulfate solution. Biopolymers 14: 1841-1846. metal ions in the conformation of poly(L-Lysine). 1975. Biopolymers 26: 625-632, 1987. 17. Sarker PK and Doty P, The optical rotatory properties 19. Davidson B and Fasman GD, The conformational of the P-configuration in polypeptides and ...

2014
Milica Spasojević Joop Vorenkamp Mark R. P. A. C. S. Jansen Paul de Vos Arend Jan Schouten

The synthesis of poly(N-isopropylacrylamide)-b-poly(L-lysine) and poly(N- isopropylacrylamide-co-acrylamide)-b-poly(L-lysine) copolymers was accomplished by combining atom transfer radical polymerization (ATRP) and ring opening polymerization (ROP). For this purpose, a di-functional initiator with protected amino group was successfully synthetized. The ATRP of N-isopropylacrylamide yielded narr...

Journal: :Plant physiology 1974
L A Hadwiger A Jafri S von Broembsen R Eddy

Increases in phenylalanine ammonia lyase activity and pisatin synthesis were induced in excised pea pods (a) by basic polypeptides such as protamine, histone, lysozyme, cytochrome c, and ribonuclease; (b) by the polyamines spermine, spermidine, cadaverine, and putrescine, and (c) by the synthetic oligopeptides poly-l-lysine, poly-dl-ornithine, and poly-l-arginine.Poly-l-lysine (1 milligram per ...

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