hHR21, Nuclear matrix protein 1, NXP-1, SCC1 homolog, HR21,KIAA0078, NXP1,Rad21.
As a member of the cohesin complex, involved in sister chromatid cohesion from the time of DNA replication in S phase to their segregation in mitosis, a function that is essential for proper chromosome segregation, post-replicative DNA repair, and the prevention of inappropriate recombination between repetitive regions.