>2a2uB (B:) SEQRES residues mkllllllclgltlvcghaeeasstrgnldvaklngdwfsivvasnkrekieengsmrvf mqhidvlenslgfkfrikengecrelylvayktpedgeyfveydggntftilktdydryv mfhlinfkngetfqlmvlygrtkdlssdikekfaklceahgitrdniidltktdrclqar g