背景介绍 Ubiquitin Specific Protease 21 reglulates transcription initiation via deubiquitinylation of histone H2A and exhibits both deubiquitinylase and deNEDDylase activities. 产品介绍 Human USP21 recombinant protein (Genbank Accession No. Q9UK80), with N-terminal SUMO- and His-tags, expressed in E. coli.