>1lk3A (A:) observed residues (from ATOM records)
nmlrdlrdafsrvktffqmkdqldnlllkeslledfkgylgcqalsemiqfyleevmpqa
enqdpdikahvnslgenlktlrlrlrrchrflpcekskaveqvknafnklqekgiykams
efdifinyieaymtmk