>6n69A (A:) observed residues (from ATOM records)
pnykllyfnmrgraeiiryifayldikyedhrieqadwpkikptlpfgkipvlevegltl
hqslaiaryltkntdlagkteleqcqvdavvdtlddfmslfpwaeenqdlkertfndllt
rqaphllkdldtylgdkewfignyvtwadfywdicsttllvlkpdllgiyprlvslrnkv
qaipaisawilkrpqtkl