6.1: Biological Significance of Iron, Zinc, Copper, Molybdenum, Cobalt, Chromium, Vanadium, and Nickel 6.2: Introduction to Amino Acids and Proteins 6.3: Redox Reactions 6.3.1: Introduction to Redox Reactions 6.3.2: Balancing Redox Reactions 6.3.3: Electrochemical Potentials 6.3.4: Prelude to Redox Stability and Redox Reactions 6.3.5: Latimer and Frost Diagrams 6.3.6: Pourbaix Diagrams 6.4: Associative Ligand Substitution 6.5: Dissociative Ligand Substitution 6.6: Biological Significance of Iron, Zinc, Copper, Molybdenum, Cobalt, Chromium, Vanadium, and Nickel 6.7: Ferrodoxins, Hydrogenases, and Nitrogenases - Metal-Sulfide Proteins 6.7.1: Iron-sulfur Proteins and Models 6.7.2: Iron-sulfur Proteins and Models (Part 2) 6.7.3: Iron-sulfur Proteins and Models (Part 3) 6.7.4: Iron-sulfur Proteins and Models (Part 4) 6.8: Overview of Hemoglobin and Myoglobin 6.8.1: Myoglobin, Hemoglobin, and their Ligands 6.8.2: Oxygen Transport by the Proteins Myoglobin and Hemoglobin