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STAG domain STAG domain proteins are subunits of cohesin complex - a protein complex required for sister chromatid cohesion in eukaryotes. The STAG domain is present in Schizosaccharomyces pombe mitotic cohesin Psc3, and the meiosis specific cohesin Rec11. Many organizms express a meiosis-specific STAG protein, for example, mice and humans have a meiosis specific variant called STAG3, although budding yeast does not have a meiosis specific version.
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