>4iytA (A:) observed residues (from ATOM records)
nienigdgaevvkrtedtssdkwgvtqniqfdfvkdkkynkdalilkmqgfinskttyyn
ykntdhikamrwpfqyniglktndpnvdlinylpknkidsvnvsqtlgyniggnfnsgpn
gsfnysktisynqqnyisevehqnsksvqwgikansfitslgkmsghdpnlfvgykpasq
nprdyfvpdnelpplvhsgfnpsfiatvshekgsgdtsefeitygrnmdvthatrrttns
ylegsrihnafvnrnytvkyevnwktheikvkghn