>6n69B (B:) observed residues (from ATOM records)
mpnykllyfnmrgraeiiryifayldikyedhrieqadwpkikptlpfgkipvleveglt
lhqslaiaryltkntdlagkteleqcqvdavvdtlddfmslfpwaeenqdlkertfndll
trqaphllkdldtylgdkewfignyvtwadfywdicsttllvlkpdllgiyprlvslrnk
vqaipaisawilkrpqtkl