SBE activity in tubers from a series of lines transformed with a SBEII overexpression construct. (A) Native PAGE activity gel with SBE activity visualized by iodine staining. (B) Mean relative SBEII activity ± SD as determined from the density of the spots. Data are from technical replicate protein preparations from the same pooled tissue as Figure 1 run on different gels on different days (n = 3). Means not sharing a common letter are significantly different between groups at P = 0.05 as determined by LSD after a one-way ANOVA test.