Post on 18-Jun-2018
Primary Structure of Bovine Insulin
Chemistry 334
A chain
B chain
G-I-V-E-Q-C-C-A-S-V-C-S-L-Y-Q-L-E-N-Y-C-N
F-V-N-Q-H-L-C-G-S-H-L-V-E-A-L-Y-L-V-C-G-E-R-G-F-F-Y-T-P-K-A
5 10 15 21
5 10 15 20 25 30
S S
S
S S
S
Note: The groups that are highlighted in red are individual cystine sulfur atoms that compose the three disulfide bonds of bovine insulin. The α-amino acid, serine (one-letter symbol: S), exists at positions 9 and 12 of the A chain, and position 9 of the B chain. Two of bovine insulin's disulfides are interchain linkages. The third disulfide is an intrachain linkage.