HSG is an alias for the gene, Mitofusin 2, in humans. Other names include: Mitofusin-2; Transmembrane GTPase MFN2; Mitofusin-2 ; CMT2A; CMT2A2; CPRP1; MARF. The encoded protein is an enzyme with an amino acid length of 757 and a mass of 86.4 kDa. HSG is a member of the TRAFAC class dynamin-like GTPase superfamily, Dynamin/Fzo/YdjA family, Mitofusin subfamily. This gene shares homology with other species, including: Mouse, Fly, Rat, Zebrafish, Frog, Chicken.