Figure 4. Proteinase K–sensitive prion protein (PrPsen) Western blot analysis from 6 hamster species performed with A) polyclonal antibody R30 (89–103) or B) R30 preincubated with peptide to prion protein 89–103. Hamster species: lane 1, Syrian; lane 2, Turkish; lane 3, Djungarian; lane 4, Syrian; lane 5, Chinese; lane 6, Armenian. Lane 7, proteinase K–resistant prion protein (PrPres) from 263K Syrian hamsters. 0.8 mg tissue equivalents per lane; 37 kDa indicated.