On-line analysis of the 13CO2 labeling of leaf isoprene suggests multiple subcellular origins of isoprene precursors. - Karl,T..; Fall,R..; Rosenstiel,T..N..; Prazeller,P..; Larsen,B..; Duane,M..; Seufert,G..; Lindinger,W.. (Planta, 2002)