Protecting effect of PrP codons M142 and K222 in goats orally challenged with bovine spongiform encephalopathy prions oleh C. Fast, W. Goldmann, P. Berthon, K. Tauscher, O. Andréoletti, I. Lantier, C. Rossignol, A. Bossers, J. G. Jacobs, N. Hunter, M. H. Groschup, F. Lantier, J. P. M. Langeveld