>1d2aB (B:) observed residues (from ATOM records)
pkisvafialgnfcrspmaeaifkhevekanlenrfnkidsfgtsnyhvgespdhrtvsi
ckqhgvkinhkgkqiktkhfdeydyiigmdesninnlkkiqpegskakvclfgdwntndg
tvqtiiedpwygdiqdfeynfkqityfskqflkkel