👉 The term "dehydrogenase" refers to a type of enzyme that catalyzes the reduction of hydrogen ions (H+) from water to form water and oxygen gas. This process is known as hydrogenation. Dehydrogenases are found in all cells, including those of plants, animals, and microorganisms, where they play important roles in energy production, biochemical reactions, and metabolism. They are responsible for breaking down organic molecules into simpler compounds, such as sugars or fatty acids, while