Figure 2. PK digests and western blots of combined brain homogenates from 6 SN6b-vaccinated, 4 age-matched, and 6 young tga20 mice. PK digests of an IP-infected (100 μl of 1% RML prion) mouse brain are shown for comparison. Error bars indicate mean and standard deviation of band intensities relative to samples not treated with PK for separate individual animal blots (not all blots shown).