Astrovirus contains 3 open reading frames (ORF) on its genomic RNA, ORF1a, ORF1b, and ORF2. 655, but not aa 170, were abolished when a 9-aa substitution was launched into the protease motif in nsP1a. The p27 processing product was also found in Caco-2 cells that had been infected with human astrovirus serotype 1, confirming the… Continue reading Astrovirus contains 3 open reading frames (ORF) on its genomic RNA,