>1xxiC (C:) observed residues (from ATOM records)
yqvlarkwrpqtfadvvgqehvltalanglslgrihhaylfsgtrgvgktsiarllakgl
ncetgitatpcgvcdncreieqgrfvdlieidaasrtkvedtrdlldnvqyapargrfkv
ylidevhmlsrhsfnallktleeppehvkfllattdpqklpvtilsrclqfhlkaldveq
irhqlehilneehiahepralqllaraaegslrdalsltdqaiasgdgqvstqavsamlg
tldddqalslveamveangervmalineaaargieweallvemlgllhriamvqlspaal
gndmaaielrmrelartipptdiqlyyqtlligrkelpyapdrrmgvemtllralafhpr
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