>1sxtB (B:) SEQRES residues kdlrkkselqgtalgnlkqiyyynekaktenkeshdqflqhtilfkgfftdhswyndllv dfdskdivdkykgkkvdlygayygyqcaggtpnktacmyggvtlhdnnrlteekkvpinl wldgkqntvpletvktnkknvtvqeldlqarrylqekynlynsdvfdgkvqrglivfhts tepsvnydlfgaqgqysntllriyrdnktinsenmhidiylyts