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## Re: In7: Very interesting paper on CTD and SCC. From: francis.gasparro@mail.tju.edu Date: 12/9/97 Time: 1:18:31 AM Remote Name: 147.140.148.54 ### Comments CTD may well be mutagennic if they form! see P&P Nov issue paper by Drouin and Therrien. They show that the sites of mutation hotspots in p53 and the sites of cpd formation match up - ie, at Cytosines! The photochemistry is dependent to some degree on the weavelength of light used. We have all gotten accustomed to seeing photoproducts formed as a result of 254 nm (favoring thymine dimerization). BUT it appears the in vivo case due to UVB irradiation leads more to cytosine photoproducts! Back to the list of comments