Pc八、所的印5551535251504984184 43 42 41 PC2 78910111213716少如98 C OH 39 S-S A chal 37 PHE GLU ER LEU TYR GLM UGSN SP 36 VAL c THR SER 56 35 s-S 5 LEU 6901121311516171819202122329、录以 6 S SER chain THR ALA TYR PC3 LEU VAL Structure of insulin