3p4u B 1.9 BS01 peptide E 0 Y217 S218 H219 R220 E221 T222 X264 Y20 S21 H22 R23 E24 T25 X67 3.4.22.59 0004197,0006508,0008234 P55212 702 ~ 705 YTLPAGADFLMCYSVAEGYYSHRETVNGSWYIQDLCEMLGKYGSSLEFTELLTLVNRKVSQRRVDFCKDPSAIGKKQVPCFASMLTKKLHFFPK