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  1. 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 …

  2. 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 …

  3. 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, …

  4. HEME Definition & Meaning - Merriam-Webster

    The meaning of HEME is the deep red iron-containing prosthetic group C34H32N4O4Fe of hemoglobin and myoglobin.

  5. Heme - Definition, Structure and Function | Biology Dictionary

    Mar 15, 2018 · A heme is an organic, ring-shaped molecule. Due to its special structure, a heme is capable of holding, or “hosting” an iron molecule. A heme is made from 4 pyrroles, which …

  6. 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 …

  7. 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 …