“…10 According to some reports, the concenitrationis of the pyridine nucleotides in normal rat liver change with age. Mondy, Strength, Gray and Daniel (1954) found a rise with age in NAD. Caiger, Morton, Filsell and Jarrett (1962) like the fibrotic primary hepatomas studied in rats, the mouse hepatomas were low in UTP, GMP and NAD, although fibrosis is not a prominent feature of the mouse hepatomas (Connell and Alexander, 1959).…”