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Figure 4. Changes in enzyme activities measured at four positions down the stem in two high (¡) and two low (l) commercial cane sugar (CCS) clones selected from the IJ76-514 x Q165 introgression population. Each point is the mean ± SE of six measurements. Activity of sucrose synthase forward (a) is expressed as µg sucrose produced mg protein–1 min–1 whereas sucrose synthase reverse (b) is expressed as sucrose cleaved mg protein–1 min–1. Cell wall invertase activity (c) is expressed as ng sucrose cleaved g FW–1 min–1.
