Converse of object

• call: One experimental approach has used a virus called vaccinia into which the gene for PSA had been cloned.

Modifies a noun

• virus: Right: Looking down onto the intact surface of a cultured cell infected with vaccinia virus.

• gene: Regulation of plaque size and host range by a vaccinia virus gene related to complement system proteins.

• topoisomerase: The project will start by looking at the vaccinia type I topoisomerase enzyme.

• infection: Vaccinia infection of cells can confer protection from IFN on other viruses, e.g. Picornaviruses.

• recombinants: The viral cDNA sequence was used to construct vaccinia virus recombinants that expressed either the entire E2 coding sequence or fragments of it.

• type: The project will start by looking at the vaccinia type I topoisomerase enzyme.