The prenyl side chain is a common feature of terpenes and is sometimes referred to as a hemiterpene (C5) derivative. Prenyl (dimethylallyl) transferases isolated from plants, bacteria or fungi catalyse the transfer of a prenyl moiety from a donor like dimethylallyldiphosphate DMAPP to an acceptor like tryptophan, indoles or structurally related compounds (Li, 2009).