>3cfkB (B:) observed residues (from ATOM records)
evkllesggglaqpggslklscaasgfdfrrywmtwvrqapgkglewigeinpdsrtiny
mpslkdkfiisrdnaknslylqlsrlrsedsalyycvrldfdvynhyyvldywgqgtsvt
vssastkgpsvfplapsskstsggtaalgclvkdyfpepvtvswnsgaltsgvhtfpavl
qssglyslssvvtvpssslgtqtyicnvnhkpsntkvdkkvepk