Gamma 1 globin, Gamma 2 globin, Gamma A hemoglobin, Gamma globin, Hb F Agamma, Hb F Ggamma, HBG1, HBG2, HBGA, HBGR,,Hemoglobin gamma 1/2
The two types of gamma chains differ at residue 136 where glycine is found in the G-gamma product (HBG2) and alanine is found in the A-gamma product (HBG1). The former is predominant at birth. The order of the genes in the beta-globin cluster is: 5-epsilon -- gamma-G -- gamma-A -- delta -- beta--3.
