>6r3pB (B:) observed residues (from ATOM records)
pgfltafeysekrkmvfhittgsqefdkllgggiesmaiteafgefrtgktqlshtlcvt
aqlpgaggypggkiifidtentfrpdrlrdiadrfnvdhdavldnvlyaraytsehqmel
ldyvaakfheeagifklliidsimalfrvdfsgrgelaerqqklaqmlsrlqkiseeynv
avfvtnqmtakkpigghilahasttrislrkgrgelriakiydspempeneatfaitagg
igdake