negative regulation of isoprene biosynthetic process
Known as: downregulation of isoprene biosynthetic process, down regulation of isoprene biosynthetic process, downregulation of 2-methyl-1,3-butadiene biosynthesis
Any process that stops, prevents or reduces the frequency, rate or extent of isoprene biosynthetic process. [GOC:mengo_curators, GOC:TermGenie]