>1xtcA (A:) observed residues (from ATOM records)
nddklyradsrppdeikqsgglmprgqseyfdrgtqmninlydhargtqtgfvrhddgyv
stsislrsahlvgqtilsghstyylyvlatapnmfnvndvlgaysphpdeqevsalggip
ysqiygwyrvhfgvldeqlhrnrgyrdryysnldiapaadgyglagfppehrawreepwi
hhappgcgnapr