RB1 and infection: However, the RB proteins Cpn0284 and 0285 fluctuated along the infection cycle with strong signals in small inclusions and no or very low signals in large inclusions between 24 and 96 hours and reappeared in large inclusions by 120 hours after infection, suggesting that Cpn0284 & 0285 are RB-specific proteins although more biochemical assays are required for confirming this conclusion.