>3tr7A (A:) observed residues (from ATOM records)
tqtwqtvlgeekqepyfqeildfvkkerkagkiiyppqkdifnalkltpyeaikvvilgq
dpyhgpnqahglafsvrpgvpappslqnifkelhadlgvsipshgflekwakqgvlllna
altveagkpqshanigwhrftdkvieslndhpegivfllwgsyaqkksqlitnlrhrilk
aphpsplsaargflgcrhfskanqllhemgrgeidwald