>1z9uB (B:) observed residues (from ATOM records)
veiipvsttlelraadeshvpalhqlvlknkawlqqsldwpqyvtsqeetrkhvqgnill
hqrgyakmylifcqnemagvlsfnaiepinkaayigywldesfqgqgimsqslqalmthy
arrgdirrfvikcrvdnqasnavarrnhftlegcmkqaeylngdyhdvnmyariid