>1k21H (H:) SEQRES residues
ivegsdaeigmspwqvmlfrkspqellcgaslisdrwvltaahcllyppwdknftendll
vrigkhsrtryerniekismlekiyihprynwrenldrdialmklkkpvafsdyihpvcl
pdretaasllqagykgrvtgwgnlketwtanvgkgqpsvlqvvnlpiverpvckdstrir
itdnmfcagykpdegkrgdacegdsggpfvmkspfnnrwyqmgivswgegcdrdgkygfy
thvfrlkkwiqkvidqfge