The function of HBG2 (hemoglobin subunit gamma 2, Ensembl gene identifier ENSG00000196565) is as follows. Gamma chains make up the fetal hemoglobin F, in combination with alpha chains. {ECO:0000269|PubMed:19065339, ECO:0000269|PubMed:21561349, ECO:0000269|PubMed:24502349}.