>2a4nB (B:) SEQRES residues miisefdrnnpvlkdqlsdllrltwpeeygdssaeeveemmnperiavaavdqdelvgfi gaipqygitgwelhplvvessrrknqigtrlvnylekevasrggitiylgtddldhgttl sqtdlyehtfdkvasiqnlrehpyefyeklgykivgvlpnangwdkpdiwmaktiiprpd sq