PLM of biotin crystals

PLM of biotin crystals

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Credit: MICHAEL W. DAVIDSON/SCIENCE PHOTO LIBRARY

Caption: Biotin. Polarised light micrograph of crystals of biotin, a B-complex vitamin. Originally known as Vitamin H, biotin has an enzyme role in the body. It functions primarily in reversible carboxylation and decarboxylation reactions. These include the conversion of proprionic acid to succinic acid, an intermediate in the citric acid cycle; and the formation of Malonyl-CoA, an intermediate in fatty acid synthesis. Good sources of biotin are yeast, egg yolk and liver. Most of a person's requirement is manufactured by intestinal bacteria, so dietary supplement is rarely needed. Biotin deficiency can cause skin and hair loss and growth problems. Magnification x10 at 35mm size.

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Keywords: biochemical, biochemistry, biotin, chemical, chemistry, co-enzyme, compound, compounds, crystal, crystals, plm, polarised light micrograph, vitamin, vitamin b, vitamin h

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