标题：Photoaffinity labeling of the primary fibrin polymerization site: isolation and characterization of a labeled cyanogen bromide fragment corresponding to gamma-chain residues 337-379
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1992
卷号：89
期号：7
页码：2888-2892
DOI：10.1073/pnas.89.7.2888
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Human fibrinogen and the plasmin-generated fibrinogen fragment D were photoaffinity labeled specifically with the peptide [14C]Gly-Pro-Arg-N(4-azido-2-nitrophenyl)Lys amide. In the case of fibrinogen, greater than 85% of the incorporated radioactivity was found in the gamma chain. Similarly, when fragment D (Mr, 90,000) was labeled with the same derivatized peptide, virtually all the radioactivity was found in the gamma-chain portion. The labeled fragment D was treated with CNBr and an initial purification was achieved by two gel-filtration steps. The labeled material was purified further by HPLC and was also compared with CNBr digests of unlabeled material. Amino acid analysis and gas-phase sequencing showed the labeled fragment to be gamma-chain residues 337-379.
