>1s72A (A:) observed residues (from ATOM records)
grriqgqrrgrgtstfrapshrykadlehrkvedgdviagtvvdiehdparsapvaavef
edgdrrlilapegvgvgdelqvgvsaeiapgntlplaeipegvpvcnvesspgdggkfar
asgvnaqllthdrnvavvklpsgemkrldpqcratigvvagggrtdkpfvkagnkhhkmk
argtkwpnvrgvamnavdhpfggggrqhpgkpksisrnappgrkvgdiaskrtgrgg