Cohesin is a protein complex that plays a crucial role in the cohesion of sister chromatids during cell division. This complex ensures that the chromatids are correctly paired and aligned, which is essential for accurate chromosome segregation during mitosis and meiosis. Cohesin is composed of four core subunits: SMC1, SMC3, SCC1 (also known as RAD21), and SCC3 (also known as SA1/SA2).
