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[U-14C]Glc uptake by maize root tips. Maize root tips were incubated with 200 mm Glc during 25 h and transferred into a medium containing 200 mm [U-14C]Glc (30 dpm nmol−1) during 5, 10, 15, and 20 min. The maize root tips were then grounded and radioactivity was counted. These data are from one representative experiment, repeated four times.
