Â For 10 points, name this B vitamin, whose amide form Â is a component of NADH and NADPH Â and whose deficiency causes pellagra.
This vitamin is used as a cofactor in single stranded DNA repair by the enzyme PARP-1. This vitamin is an inhibitor for the DGAT2 catalyzed reaction in which diacylglycerols become triglycerides. This vitamin also inhibits the HDL-catabolism receptor; both these functions ultimately lead to decreased production of VLDLs and LDLs. Synthesis of one form of this vitamin has intermediates such as (*) kynurenine and hydroxyanthranilic acid from a tryptophan precursor.  One form of this vitamin captures the energy released in a cellular reaction converting glyceraldehyde-3-phosphate into 1-3-bisphosphoglycerate and releases it onto complex 1 of the electron transport chain. Â For 10 points, name this B vitamin, whose amide form Â is a component of NADH and NADPH Â and whose deficiency causes pellagra. 
This vitamin is used as a cofactor in single stranded DNA repair by the enzyme PARP-1.
Vitamin B3 or Niacin or Nicotinic Acid or Nicotinamide 