Erythrocruorins

**Definition:** High molecular weight (1,500,000 to 3,000,000) hemoglobins found in the plasma of many polychete and oligochete annelid worms, crustaceans, insects, and mollusks. They bind one mole of oxygen per heme and function as oxygen carriers.

**Tree numbers:** - D12.776.093.312 - D12.776.422.316.762.260