MYC and infection: Infection of R26-rtTA;TRE-CiG/rtTA;Eμ-Myc with pUSPPC driving an sgp53-3, following by stem cell transplant and monitoring for lymphomagenesis revealed that dilutions of pUSPPC/sgp53-3 up to 1:50 were still capable of yielding tumors (Figure 5A, B).