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An unknown brownish protein was purified by ammonium sulfate precipitation and DEAE-cellulose column and hydroxyapatite column chromatographies from pumpkin callus treated with a high concentration of 2,4-D. The apparent molecular mass and isoelectric point of the purified protein were estimated to be 38 kD and 4.6, respectively. The absorption spectra of the protein showed a shoulder at around 280...
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