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Identification of two isoforms of COMT in maize leaves. Arrows indicate the proteins identified by LC-MS/MS and correlated with COMT1, CCoAOMT, and PAL on a silver-stained 2D gel of leaf proteins from the F2 inbred line of maize. The inset shows an enlargement of the framed region in the Io wild-type line (Bm3/Bm3) and in the near-isogenic line bearing the bm3 mutation (bm3/bm3). COMT1 and COMT2 are present in Bm3/Bm3 and absent in bm3/bm3.
