>3crhB (B:) observed residues (from ATOM records) hhhhhfnlppgnykkpkllycsngghflrilpdgtvdgtrdrsdqhiqlqlsaesvgevy ikstetgqylamdtdgllygsqtpnseclflerleenhyntyiskahaeknwfvglkkng sckrgprthygqkailflplpv