| 
      
        | 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 |  |  |  |