Effect of USP18 on PEPT1 in absence and presence of Actinomycin D.

<p>Arithmetic means ± SEM (n = 15–16) of I_gly-gly in <i>Xenopus</i> oocytes injected PEPT1 without (white bar) or with (black bar) wild type USP18 in the absence (left bars) and presence (right bars) of 50 nM Actinomycin D 72 hours prior to measurement. *(p<0.05) indicates statistically significant difference from the absence of USP18.