Fourteen different GLUT receptors (GLUT1-12, GLUT14, and H/myo-inositol transporter) exist: the enhanced glucose consumption observed in tumor cells has been associated with overexpression of GLUT1, commonly found in brain and erythrocytes, but may also involve other GLUTs, including the heart-, skeletal muscle-, and adipose tissue-specific GLUT4 [192]. The gene discussed is SLC2A1; the disease is neoplasm.