9A and B)
9A and B). of the transmembrane domain, their small size, and their sequence diversity. Nevertheless,trans-complementation experiments demonstrated the ability of a representative O3-like protein from each chordopoxvirus genus to rescue the infectivity of a VACV mutant that was unable to express endogenous O3. Moreover, recombinant viruses expressing O3 homologs in place of O3 replicated and…