>1sq4B (B:) observed residues (from ATOM records)
kssyyaphgghpadramfteayavipkgvmrdivtshlpfwdnmrmwviarplsgfaetf
sqyivelapnggsdkpeqdpnaeavlfvvegelsltlqgqvhamqpggyafippgadykv
rnttgqhtrfhwirkhyqkvdgvplpeafvtneqdiqplvmpdtegrwsttrfvdmsdmr
hdmhvnivnfepggvipfaethvmehglyvlegkavyrlnqdwveveagdfmwlrafcpq
acysggpgrfryllykdvnrhmrltln