>4urnB (B:) observed residues (from ATOM records)
gstdkrglhhlvyeivdnsvdevlngygneidvtinkdgsisiedngrgmptgihksgkp
tveviftvlgvgasvvnalsewleveihrdgniyhqsfknggspssglvkkgktkktgtk
vtfkpddtifkastsfnfdvlserlqesafllknlkitlndlrsgkerqehyhy