Heme | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-10-05

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Heme


00:00:46 1 Function
00:03:06 2 Types
00:03:15 2.1 Major hemes
00:03:50 2.2 Other hemes
00:06:51 2.3 Use of capital letters to designate the type of heme
00:08:43 3 Synthesis
00:10:52 4 Synthesis for food
00:11:22 5 Degradation
00:13:52 6 In health and disease
00:15:19 7 Genes
00:16:30 8 Notes and references



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SUMMARY
=======
Heme or haem is a coordination complex "consisting of an iron ion coordinated to a porphyrin acting as a tetradentate ligand, and to one or two axial ligands."  The definition is loose, and many depictions omit the axial ligands.  Many porphyrin-containing metalloproteins have heme as their prosthetic group; these are known as hemoproteins. Hemes are most commonly recognized as components of hemoglobin, the red pigment in blood, but are also found in a number of other biologically important hemoproteins such as myoglobin, cytochromes, catalases, heme peroxidase, and endothelial nitric oxide synthase.The word heme is derived from Greek αἷμα haima meaning "blood".