>1s68A (A:) observed residues (from ATOM records)
mfkkysslenhynskfieklyslgltggewvarekihgtnfsliierdkvtcakrtgpil
paedffgyeiilknyadsikavqdimetsavvsyqvfgefagpgiqknvdycdkdfyvfd
iivttesgdvtyvddymmesfcntfkfkmapllgrgkfeeliklpndldsvvqdynftvd
haglvdankcvwnaeakgevftaegyvlkpcypswlrngnrvaikcknskfse