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Modeled USP1 catalytic core structure. The catalytic core was modeled using USP7 as a template. The USP1 palm, thumb, and finger domains are colored green, olive, and red respectively. Ubiquitin is built into the modeled structure by superimposing USP1 onto USP7-Ub complex structure. The site of the inserted domain is indicated by an arrow. The catalytic triad residues are labeled.
