>4y16D (D:) observed residues (from ATOM records)
aavtqsprnkvavtggkvtlscnqtnnhnnmywyrqdtghglrlihysygagstekgdip
dgykasrpsqenfslilelatpsqtsvyfcasgdegytqyfgpgtrllvledlrnvtppk
vslfepskaeishtqkatlvclatgfypdhvelswwvngkevhsgvctdpqplkeqpaln
dsryslssrlrvsatfwqnprnhfrcqvqfyglsendewtqdrakpvtqivsaeawgra