What Is Hemoglobin Called When It Is Carrying Oxygen?

What Is Hemoglobin Called When It Is Carrying Oxygen? Oxyhemoglobin is formed during physiological respiration when oxygen binds to the heme component of the protein hemoglobin in red blood cells. What is oxygen hemoglobin called? Oxyhemoglobin: The oxygen-loaded form of hemoglobin, the predominant protein in red blood cells. Hemoglobin is a protein molecule that binds