>3rw7B (B:) observed residues (from ATOM records)
elkpeqveqlklimskrydgsqqaldlkglrsdpdlvaqnidvvlnrrscmaatlriiee
nipellslnlsnnrlyrlddmssivqkapnlkilnlsgnelksereldkikglkleelwl
dgnslcdtfrdqstyisairerfpkllrldghelpppiaf