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| N-ribosylnicotinamide ： ウィキペディア英語版 |
Nicotinamide riboside
Nicotinamide riboside (NR) is a pyridine-nucleoside form of vitamin B3 that functions as a precursor to nicotinamide adenine dinucleotide or NAD+.
==Discovery of NR as a bacterial NAD precursor==
NR was first described as a growth factor, termed Factor V, for Haemophilus influenza, a bacterium that lives in and depends on blood. Factor V, purified from blood was shown to exist in three forms: NAD+, NMN and NR. NR was the compound that led to the most rapid growth of this bacterium. Notably, Haemophilus influenza cannot grow on nicotinic acid, nicotinamide, tryptophan or aspartic acid, which were the previously known precursors of NAD+.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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