Transport Proteins, Volume 123, provides the latest information on the two major groups of transport proteins, those that carry molecules to different locations within a cell or organism and those that carry molecules across otherwise impermeable membranes. Chapters in the updated release include Biology of Iron Transport: Ferroportin, Transport of transition metals across biological membranes, The effect of sport and physical activity on transport proteins: implications for cancer prevention and control, Structural rearrangement in polyketide synthase for improvement its bio-physicochemical properties, Autophagy Proteins and its Homeostasis in Cellular Environment, and much more.