ID 4.2.3.27 DE isoprene synthase. AN ISPC. AN ISPS. CA dimethylallyl diphosphate = diphosphate + isoprene. CC -!- Located in the chloroplast of isoprene-emitting plants, such as CC poplar and aspen, and may be activitated by light-dependent changes CC in chloroplast pH and Mg(2+) concentration. DR Q50L36, ISPS_POPAL ; Q9AR86, ISPS_POPCN ; Q7XAS7, ISPS_POPTM ; DR Q6EJ97, ISPS_PUEML ; //