Plays an important role in the loading of the cohesin complex on to DNA. Forms a heterodimeric complex (also known as cohesin loading complex) with NIPBL/SCC2 which mediates the loading of the cohesin complex onto chromatin (PubMed:22628566, PubMed:28167679). Plays a role in sister chromatid cohesion and normal progression through prometaphase (PubMed:16682347, PubMed:16802858).