SLC2A4 is a symbol for the gene, Solute carrier family 2 (facilitated glucose transporter), member 4, in humans. Other names include: Solute carrier family 2, facilitated glucose transporter member 4; GLUT-4; Glucose transporter type 4, insulin-responsive; GLUT4. The encoded protein has an amino acid length of 509 and a mass of 54.8 kDa. Other isoforms may exist. SLC2A4 is a member of the Major facilitator superfamily, Sugar transporter (TC 2.A.1.1) family, Glucose transporter subfamily. This gene shares homology with other species, including: Mouse, Rat.