>4pc2B (B:) observed residues (from ATOM records)
tkphvnvgtighvdhgkttltaaittvlaktyggaarakargitintshveydtptrhya
hvdcpghadyvknmitgaaqmdgailvvaatdgpmpqtrehillgrqvgvpyiivflnkc
dmvddeellelvemevrellsqydfpgddtpivrgsalkalegdaeweakilelagflds
yipeperaidkpfllpiedvfsisgrgtvvtgrvergiikvgeeveivgiketqkstctg
vemfrklldegragenvgvllrgikreeiergqvlakpgtikphtkfesevyilskdegg
rhtpffkgyrpqfyfrttdvtgtielpegvemvmpgdnikmvvtlihpiamddglrfair
eggrtvgagvvakvlg