>1xt6A (A:) SEQRES residues akalivygsttgnteytaetiareladagyevdcrdaasveagglfegfdlvllgcstwg ddsielqddfiplfdsleetgaqgrkvacfgcgdssyeyfcgavdaieeklknlgaeivq dglridgdpraarddivgwahdvrgai