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. 2014 Feb 17;24(4):415–421. doi: 10.1016/j.cub.2013.12.052

Figure 4.

Figure 4

Phosphorylation of PikI Activates Kinase Activity

(A) Quantification of PI(4,5)P2 production over a range of substrate concentrations for wild-type and phosphomutants of PikI. Data represent mean ± SEM from four repeats using two different recombinant protein preparations.

(B) Km (μM) and Vmax (pmol PI(4,5)P2/min/mg recombinant protein) of wild-type and phosphomutants of PikI, determined by fitting Michaelis-Menten curves to each data set and compared using a one-way ANOVA followed by Tukey’s post hoc test. p < 0.05.