>1lk3B (B:) observed residues (from ATOM records) nmlrdlrdafsrvktffqmkdqldnlllkeslledfkgylgcqalsemiqfyleevmpqa enqdpdikahvnslgenlktlrlrlrrchrflpcekskaveqvknafnklqekgiykams efdifinyieaymtmk