>2bt2A (A:) SEQRES residues mhhhhhhssgvdlgtenlyfqsmrnfsedvlgwresfdlllsskngvaafhaflktefse enlefwlaceefkkirsatklasrahqifeeficseapkevnidhetreltrmnlqtata tcfdaaqgktrtlmekdsyprflkspayrdlaaqasaasat