For in vivo deubiquitinating enzyme assay, HA-tagged pMT123-ubiquitin was transiently expressed in human endometrial carcinoma cells (HEC-1A) with or without pcDNA3-myc-USP17L and pcDNA3-myc-USP17L (C89S). This evidence concerns the gene USP17L9P and endometrial carcinoma.