>2prrH (H:) observed residues (from ATOM records)
ahpisrypvpelaalpddirqrilevqdkagfvpnvfltlahrpdefraffayhdalmlk
dggltkgeremivvatsaanqclycvvahgailriyekkplvadqvavnylkadipprqr
amldfalkvckashevneadfealrehgftdedawdiaaitaffglsnrmantigmrpnd
efflmgrvpk