Figure 3.

PrP variant combinations in CWD positive and negative deer. Combinations of protein variants are colour-coded; deer with both chromosomes encoding PrP variant A (AA) are shown in yellow, deer with PrP variant C encoded by at least one chromosome are shown in blue (AC or CC), deer with PrP variant F encoded by at least one chromosome are shown in orange (AF or FF), deer with one chromosome encoding PrP variant C and the other encoding F are shown in purple (CF), and deer with other protein variants encoded by at least one chromosome are in white (others). The much higher proportion of AA relative to other combinations is evident among CWD positive relative to CWD negative deer. No FF or CF deer were detected among CWD positive deer.