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A limited number of E2 enzymes are up regulated upon Dex treatment. C2C12 myotubes were untreated (CT) or treated with either 1 μM (A) or 0.16 μM (B) Dex. mRNA levels for E2s highly expressed in skeletal muscle were determined by qRT–PCR. The E3 ligase MuRF1 was used as a control of catabolic conditions. Only UBE2B was up regulated upon low levels of Dex. * P < 0.01, n = 6.
