>1tx4B (B:) observed residues (from ATOM records)
airkklvivgdgacgktcllivnskdqfyvptvfenyvadievdgkqvelalwdtagqed
ydrlrplsypdtdvilmcfsidspdslenipekwtpevkhfcpnvpiilvgnkkdlrnde
htrrelakmkqepvkpeegrdmanrigafgymecsaktkdgvrevfematraal