>2bt2B (B:) SEQRES residues mhhhhhhssgvdlgtenlyfqsmrnfsedvlgwresfdlllsskngvaafhaflktefse enlefwlaceefkkirsatklasrahqifeeficseapkevnidhetreltrmnlqtata tcfdaaqgktrtlmekdsyprflkspayrdlaaqasaasat