>6k12F (F:) observed residues (from ATOM records)
nkitvigvgavgmacafsilnkeladelvlidvvedklkemmdlqqgslflktpniiagk
eltansklvvvtagiipnvvkyspcillivsnpvdiltyvawklsgfplnrvigsgcnld
sarfrylvsemigihpsnfhgcilgehgdssvpilsglniagmsdvhkkvtesayeiikl
kgytswaiglsvgdlscsliknlrkvhpvstlvkgqfgidnevflsvpcvlgrngisevf
kkltveeeqqlknsaetitqkdiql