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Schematic representation of human sperm cell and localization of several glucose transporter isoforms in the distinct parts of the spermatozoon, namely head (which includes the nucleus and acrosome) and tail (comprehending the midpiece, principal piece and endpiece). GLUT1: glucose transporter 1; GLUT2: glucose transporter 2; GLUT3: glucose transporter 3; GLUT5: glucose transporter 5; GLUT8: glucose transporter 8; GLUT9a: glucose transporter 9a; GLUT9b: glucose transporter 9b.
