>1z3uC (C:) observed residues (from ATOM records)
sfrdcaevfksghttngiytltfpnsteeikaycdmeaggggwtiiqrredgsvdfqrtw
keykvgfgnpsgeywlgnefvsqltnqqryvlkihlkdwegneayslyehfylsseelny
rihlkgltgtagkissisqpgndfstkdgdndkcickcsqmltggwwfdacgpsnlngmy
ypqrqntnkangikwaawkgsgyslkattmmirpad