IndraLab

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"Although the conserved cysteine residue in the triad of classical DUBs is replaced by alanine (A526) in the UCH domain of USP52, we demonstrated that addition of the alkylating reagent N-ethylmaleimide (NEM), a known inhibitor of cysteine proteases XREF_BIBR, XREF_BIBR, almost completely abolished the catalytic activity of USP52 against K48- or K63 linked tetra-ubiquitins."