Mammals D. melanogaster S. cerevisiae S. pombe Function
SMC1A Smc1 Smc1 Psm1 core cohesin (mitosis)
SMC1B core cohesin (meiosis)
SMC3 Smc3 Smc3 Psm3 core cohesin
RAD21 Rad21/Vtd Mcd1/Scc1 Rad21 core cohesin (mitosis)
REC8 C(2)M Rec8 Rec8 core cohesin (meiosis)
SA1/STAG1 SA (Stromalin) Scc3 Psc3 core cohesin (mitosis)
SA2/STAG2 SA2 (Stromalin-2) core cohesin (meiosis)
SA3/STAG3    
Table 1: Subunits of the core cohesin complex.