This book presents and discusses a variety of research done in the field of biochemistry, with a particular focus on ligands, polymers and amino acids. Topics discussed include GQuadruplex Ligands and the evaluation of a synthetic biomimetic ligand used for the purification of therapeutic proteins; phytoestrogens biochemical aspects and biological activities; increase in amino acids and ammonia during liquefaction of semen; the structure of inhibitor polymers and prebiosis with fermentable carbohydrates in pig nutrition.