Heme - Wikipedia
The most common type is heme B; other important types include heme A and heme C. Isolated hemes are commonly designated by capital letters while hemes bound to proteins are …
What Is a Heme Molecule and What Is Its Function?
Aug 2, 2025 · A heme molecule is a fundamental organic, ring-shaped structure found throughout biological systems. Its unique architecture allows it to host an iron atom, making it a versatile …
Heme: The Lord of the Iron Ring - PMC
Heme is an iron-protoporphyrin complex with an essential physiologic function for all cells, especially for those in which heme is a key prosthetic group of proteins such as hemoglobin, …
Heme - an overview | ScienceDirect Topics
Heme is an iron-containing molecule within hemoglobin that serves as the site for oxygen binding. Owing to its potent reactivity, homeostasis of heme is tightly regulated and controlled via its …
Heme | chemical compound | Britannica
Heme is composed of a ringlike organic compound known as a porphyrin, to which an iron atom is attached. It is the iron atom that reversibly binds oxygen as the blood travels between the …
Definition of heme - NCI Dictionary of Cancer Terms
The heme part of hemoglobin is the substance inside red blood cells that binds to oxygen in the lungs and carries it to the tissues.
Biochemistry, Heme Synthesis - StatPearls - NCBI Bookshelf
Heme is a porphyrin ring complexed with ferrous iron and protoporphyrin IX. Heme is an essential prosthetic group in proteins that is necessary as a subcellular compartment to perform diverse …