nucleotide sequencing of a region of the vaccinia virus genome proximal to the right inverted terminal repeat ( itr ) identified two open reading frames ( orfs ) encoding proteins of 39k and 40k with amino acid homology to each other , to another vaccinia virus gene near the opposite end of the virus genome and to the superfamily of serine proteinase inhibitors ( serpins ) .
C0036733
serine proteinase inhibitors
C0036764
serpins