The function of NCAPG2 (non-SMC condensin II complex subunit G2, ENSG00000146918) is as follows. Regulatory subunit of the condensin-2 complex, a complex which establishes mitotic chromosome architecture and is involved in physical rigidity of the chromatid axis. {ECO:0000269|PubMed:14532007, ECO:0000269|PubMed:30609410}.