Figure 2. MDH isozymes pattern obtained in Histidine/Citric acid, pH 5.7, for coleoptile from C2 cycle of the CMS-43 popcorn variety. Samples 1-5 and 13-17 show the cytosol (sMDH-1, sMDH-2, sMDH-3) and mitochondrial MDH (mMDH-1, mMDH-2, mMDH-3, mMDH-4, mMDH-5, mMDH-6), and samples 6-12 and 18-20 show only the mMDH isozymes obtained by mitochondrial isolation procedures.