English to Italian Medical Medical (general) Article on Chimerism

I have suggested DNA as the source because it brings the necessary reliable asymmetry forward from the beginning, and cells of every living thing appropriately questioned have demonstrated ways to know the difference between old strand and new, leading strand and trailing strand (Pierucci and Zuchowski, 1973; Dalgaard and Klar, 2001a,b; Klar, 2004a) for their use in allocating the modifications that constitute their epigenetic programming (Santos and Dean, 2004).