Furthermore, replicate-competent or -incompetent ERV particles directly correlate with prion infectivity, as previous studies have shown that molony MuLV (MoMuLV), which belongs to ecotropic MuLV, strongly enhances the release of scrapie infectivity and that MoMuLV virions were specifically immunoprecipitated by anti-PrP antibodies [66,67]. The gene discussed is PRNP; the disease is scrapie.