Figure 3. Particular sequence variations in PrPC from species of the Order Carnivora.
$ SEs: Sequence Elements, 9QG = nonapeptide PQGGGGWGQ, 9HA = nonapeptide PHAGGGWGQ, 8HG = octapeptide PHGGGWGQ, 9HG = nonapeptide PHGGGGWGQ; n, number of repeated SEs in brackets; r, number of total SEs (mode for all other species is five); Caniformia codon positions, equivalent codons for Felidae +3 when r = 5. (equivalent codons in Primates −4, in Rodentia −5). All other known PRNP sequences (>400): 98% N, 99% H, 99% K.