>1s5xB (B:) observed residues (from ATOM records)
vewtdkersiisdifshmdyddigpkalsrclivypwtqrhfsgaiignanvaahgikvl
hgldrgvknmdniaatyadlstlhseklhvdpdnfkllsdcitivlaakmghaftaetqg
afqkflavvvsalgkq