IndraLab
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"While the co-expression of Mdm2 and USP48 strongly enhanced p53 ubiquitination (XREF_FIG), USP48 was not capable of inducing p53 ubiquitination in the absence of Mdm2 (XREF_FIG), suggesting that the observed increase in Mdm2 levels was largely responsible for the enhancement of p53 ubiquitination in the presence of USP48."