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Genomic DNA analysis of PA-PPO. Genomic DNA (20 μg per lane) was digested with EcoRI (lane 1), HindIII (lane 2), and EcoRI and HindIII (lane 3), hybridized with an RT-PCR PPO fragment from apricot and washed at low stringency. λDNA codigested with EcoRI and HindIII (Promega) was used as a molecular mass marker.
