Erythropoietin, Volume 105, the latest release in the Vitamins and Hormones series first published in 1943, and the longest-running serial published by Academic Press, provides up-to-date information on crystal structures and basic structural studies on neurotrophins and their receptors, neurotrophin functions and the biological actions of neurotrophins related to clinical conditions and disease. Topics covered in this new volume include Erythropoietin Receptor Structural Domains, Analysis of the Asymmetry of Activated EPO Receptor Enables Designing Small Molecule Agonists, Endogenous Erythropoietin, Erythropoietin Receptor Signaling and Lipid Rafts, and Erythropoietin and Hypothalamic-Pituitary Axis. Each thoroughly reviewed volume focuses on a single molecule or disease that is related to vitamins or hormones, with the topic broadly interpreted to include related substances, such as transmitters, cytokines, growth factors and others. This volume documents the activities of this vital molecule, also describing the structure and function of erythropoietin and its receptor.