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Patterns of NAD+biosynthesis gene expression during skeletal muscle differentiation and muscle development. 8 day differentiation time course of Nmrk1(A), Nmrk2(B), and Nampt(C) mRNA expression in C2C12 and primary myotubes (n = 3–4). 8-day C2C12 myotube differentiation time course of NAD+ biosynthesis enzyme protein expression (D).
