>1s7nA (A:) observed residues (from ATOM records)
veiipvsttlelraadeshvpalhqlvlknkawlqqsldwpqyvtsqeetrkhvqgnill
hqrgyakmylifcqnemagvlsfnaiepinkaayigywldesfqgqgimsqslqalmthy
arrgdirrfvikcrvdnqasnavarrnhftlegcmkqaeylngdyhdvnmyariida