>2a2nB (B:) observed residues (from ATOM records)
qaegpkrvsdsaiihtsmgdihtklfpvecpktvenfcvhsrngyynghtfhriikgfmi
qtgdptgtgmggesiwggefedefhstlrhdrpytlsmanagsntngsqffitvvptpwl
dnkhtvfgrvtkgmevvqrisnvkvnpktdkpyedvsiinitvk