Diurnal dynamics of (a) measured maximal invertase activity and (b) simulated rates of Scr cleavage ( v
) for wild-type (black lines) and mutant (grey lines). Values in (a) represent means ± SD (Nr = 5 replicates), values in (b) represent means ± SD (identification runs: Ni,Col-0 = 72, Ni,inv4= 71). Time 0 h = 06:00 a.m. daytime. Concentrations are given in μmol per gFW (leaf fresh weight).