>4x81B (B:) observed residues (from ATOM records)
stgvelyldllkrtvsnfiyqdathvaglitqaafveearesgedyptvahtaigmkrln
nlqhcvesalrdgvpgdvletgvwrggacifargilkaydvrdrtvwvadsfqgfpkitd
ddhpmdaemnlhqynaavdlptslatvqrnfsrygllddqvrflpgwfkdtmptapferl
avlrmdgdsygatmdvlthayprlspggfaiiddycipacreavheyrdrhgisdeivei
drqgvywrrs