>1b7xB (B:) observed residues (from ATOM records)
ivegsdaeigmspwqvmlfrkspqellcgaslisdrwvltaahcllyppwdknftendll
vrigkhsryerniekismlekiyihprynwrenldrdialmklkkpvafsdyihpvclpd
retaasllqagykgrvtgwgnlkegqpsvlqvvnlpiverpvckdstriritdnmfcagy
kpdegkrgdacegdsggpfvmkspfnnrwyqmgivswgegcdrdgkigfythvfrlkkwi
qkvidq