Bovine protein C: amino acid sequence of the light chain.
The amino acid sequence of the light chain of bovine protein C was determined by sequenator analysis of the carboxymethylated light chain and fragments obtained by cyanogen bromide treatment, tryptic digestion after blocking of lysine residues, and cleavage with 2-(2-nitrophenylsulfenyl)-3-methyl-3-bromoindolenine (BNPS-skatole). The sequence was (in the standard one-letter code) A-N-S-F-L-X-X-L-R-P-G-N-V-X-R-X-C-S-X-X-V-C-X-F-X-X-A-R-X-I-F-Q-N-T-X-D-T-M-A-F-W-S-K-Y-S-D-G-D-Q-C-E-D-R-P-S-G-S-P-C-D-L-P-C-C-G-R-G-K-C-I-H-G-L-G-G-F-R-C-D-C-A-E-G-W-E-G-R-F-C-L-H-E-V-R-F-S-N-C-S-A-E-B-G-G-C-A-H-Y-C-M-E-E-E-G-R-R-H-C-S-C-A-P-G-Y-R-L-E-D-D-H-Q-L-C-V-S-K-V-T-F-P-C-G-R-L-G-K-R-M-E-K-K-R-K-T-L. The first eleven glutamic acid residues were carboxylated to gamma-carboxyglutamic acid (X). The NH2-terminal, vitamin K-dependent part showed an extensive homology to both prothrombin and factor X, whereas the rest of the chain showed a strong homology to factor X but little similarity to prothrombin.[1]References
- Bovine protein C: amino acid sequence of the light chain. Fernlund, P., Stenflo, J., Tufvesson, A. Proc. Natl. Acad. Sci. U.S.A. (1978) [Pubmed]
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