>1ck4A (A:) observed residues (from ATOM records)
tqldivivldgsnsiypwesviaflndllkrmdigpkqtqvgivqygenvthefnlnkys
steevlvaankigrqgglqtmtalgidtarkeafteargarrgvkkvmvivtdgeshdny
rlkqviqdcedeniqrfsiailghynrgnlstekfveeiksiaseptekhffnvsdelal
vtivkalgerifa