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[14C]GA20 metabolism in isolated pea internodes cultured on Murashige and Skoog solution with and without IAA. A, Six-hour incubation without IAA; B, 6 h with IAA; C, 24 h without IAA; D, 24 h with IAA. Data are shown as percentages of total radioactivity in the HPLC run. The retention times of authentic GA standards are indicated, as is the percentage of radioactivity for peaks where these are off scale.
