>1sx6A (A:) observed residues (from ATOM records)
laehllkplpadkqietgpfleavshlppffdclgspvftpikadisgnitkikavydtn
pakfrtlqnilevekemygaewpkvgatlalmwlkrglrfiqvflqsicdgerdenhpnl
irvnatkayemalkkyhgwivqkifqaalyaapyksdflkalskqnvteeeclekirlfl
vnytatidviyemytqmnaelnykv