>4l57B (B:) observed residues (from ATOM records)
svrvlvdmdgvladfeagllrgfrrrfpeephvpleqrrgflareqyralrpdladkvas
vyeapgffldlepipgaldavremndlpdtqvfictspllkyhhcvgekyrwveqhlgpq
fveriiltrdktvvlgdlliddkdtvrgqeetpswehilftcchnrhlvlpptrrrllsw
sdnwreildskr