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Diagram showing the structure of the haem group
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Diagram showing the structure of the haem group
Diagram showing the atomic structure of the haem group of the haemoglobin molecule, the oxygen- transporting protein in red blood cells that transfers oxygen from the lungs to the bodys tissues. A single iron atom (Fe, colour-coded orange) is bound to 4 nitrogen atoms held in the centre of a tetrapyrrole ring that is incorporated into a large protein structure. A fifth bond exists between a group on the protein molecule. Here, iron is in its +2 oxidation state & has a coordination number (bonding capacity) of 6. The structure therefore allows for 1 oxygen molecule to be bound to iron without oxidising it
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6420835
© FRANCIS LEROY, BIOCOSMOS/SCIENCE PHOTO LIBRARY
Haemoglobin Red Blood Cell Cells
EDITORS COMMENTS
This print showcases a detailed diagram illustrating the intricate structure of the haem group found in the haemoglobin molecule. Haemoglobin, known as the oxygen-transporting protein in red blood cells, plays a vital role in transferring oxygen from our lungs to various tissues within our body. The diagram highlights a single iron atom (Fe) that is color-coded orange and bound to four nitrogen atoms at the center of a tetrapyrrole ring. This ring is incorporated into a larger protein structure, forming an essential part of haemoglobin's composition. Additionally, there exists a fifth bond between a specific group on the protein molecule. Notably, this image emphasizes that iron is present in its +2 oxidation state and possesses a coordination number (bonding capacity) of 6. Such structural characteristics allow for one oxygen molecule to bind with iron without oxidizing it. Through this visually stunning depiction, we gain insight into the remarkable architecture of haemoglobin's heme group within red blood cells. Understanding these intricacies helps us appreciate how our bodies efficiently transport and deliver life-sustaining oxygen throughout our system. Science Photo Library has once again provided us with an extraordinary glimpse into the fascinating world of human anatomy and physiology through their exceptional photography skills.
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