>2a68A (A:) observed residues (from ATOM records)
mldsklkapvftvrtqgreygefvleplergfgvtlgnplrrillssipgtavtsvyied
vlhefstipgvkedvveiilnlkelvvrflnpslqtvtlllkaegpkevkardflpvadv
eimnpdlhiatleeggrlnmevrvdrgvgyvpaekhgikdrinaipvdavfspvrrvafq
vedtrlgqrtdldkltlriwtdgsvtplealnqaveilrehltyfsnpq