>2a4nA (A:) observed residues (from ATOM records)
miisefdrnnpvlkdqlsdllrltwpeeygdssaeeveemmnperiavaavdqdelvgfi
gaipqygitgwelhplvvessrrknqigtrlvnylekevasrggitiylgtddldhgttl
sqtdlyehtfdkvasiqnlrehpyefyeklgykivgvlpnangwdkpdiwmaktiiprpd