sentence: Heme is an organic molecule.
sentences_after: This means it contains Carbon. Each hemoglobin molecule has four globin chains, four heme molecules, and four Iron atoms. Globin is a protein that is in the body. Each globin chain surrounds a heme. When hemoglobin is in the lungs, it picks up oxygen in its heme, and carries it to the rest of the body.
concept_name: heme
headings: Hemoglobin Structure
categories: Biochemistry Iron compounds