I know that there are often specific areas, often within A, that are responsible for this temp. sensitivity, but what is actually going on, in say SV40 tsA1499?
Tegtmeyer P published a lot of the studies trying to answer exactly this question starting in the early 70's and ending in the mid 90's of the previous millenium:
Proc Natl Acad Sci U S A. 1973 Jul;70(7):1927-30.
Relationship of replication and transcription of Simian Virus 40 DNA.
Cowan K, Tegtmeyer P, Anthony DD.
J Virol. 1996 Oct;70(10):7224-7.
Differential interaction of temperature-sensitive simian virus 40 T antigens with tumor suppressors pRb and p53.
Still it seems like we don't know, specifically, physically, how temperature is affecting these mutants, wether it be conformational change or bond melting.
Have you worked with tsSV40s before? Where can I buy them?