MadSci Network: Biochemistry

Re: What is the B vitamin number of Niacin

Date: Wed Mar 7 10:40:37 2001
Posted By: Michael Onken, Admin, MadSci Network
Area of science: Biochemistry
ID: 983978237.Bc

Niacin - either nicotinic acid or nicotinamide (shown here) - is designated as Vitamin PP ("PP" stands for "Pelagra-Preventing"). Because of its inclusion in the B-complex group of vitamins, I have also seen it referred to as vitamin B3; however, this name is not recognized by IUPAC or any scientific organization I could find - they all refer to it as vitamin PP. Niacin is used by cells to make the dinucleotide coenzymes NAD+ (Nicotinamide Adenosine Dinucleotide) and NADP+ (NAD-Phosphate), which are important for energy transfer and storage. The numbered B-complex vitamins are thiamine (vitamin B1), riboflavin (vitamin B2), pyridoxine (vitamin B6), and cobalamin (vitamin B12). The B-complex also includes biotin, folic acid, and pantothenic acid.

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