What Is Bilirubin A Breakdown Product Of?

What Is Bilirubin A Breakdown Product Of? Share Give Feedback External Websites. Bilirubin, a brownish yellow pigment of bile, secreted by the liver in vertebrates, which gives to solid waste products (feces) their characteristic colour. It is produced in bone marrow cells and in the liver as the end product of red-blood-cell (hemoglobin) breakdown. What