Final answer:
The combination of protoporphyrin and Fe⁺⁵ through the enzyme ferrochelatase to form heme is known as Heme Synthesis, which is essential for the production of hemoglobin and other heme-containing proteins.
Step-by-step explanation:
The process by which protoporphyrin and Fe²⁺ combine to form heme via the enzyme ferrochelatase is called Heme Synthesis. Heme is an essential component of hemoglobin, the oxygen-carrying molecule in red blood cells.
Furthermore, the synthesis of heme is a critical process that is regulated by various enzymes and intermediates, ensuring adequate production and integration into hemoglobin and other heme-containing proteins like cytochromes, which are involved in electron transport and energy production within cells.