5.4.99.4	additional information	inducible enzyme, participates in the anaerobic conversion of nicotinic acid to equimolar amounts of propionate	
5.4.99.4	additional information	enzyme is induced by growth on nicotinic acid and is not detectable in cells grown on glucose	
5.4.99.4	additional information	carbon-skeleton rearrangement mechanism. Adenosylcobalamin acts as a carrier for the hydrogen atom that is abstracted from alpha-methyleneglutarate and replaced by the acrylyl group of 2-methyleneglutarate