NlpI has different binding sites for MepS and PBP4 as shown by the ability of labelled MepS to bind preformed NlpI-PBP4 (C) complexes by a fixed concentration MST assay. Values are mean ± standard deviation of 3-6 independent experiments. To calculate significance, the data were fit using a linear model. Calculated means were compared using Tukey's HSD test, resulting in p-values corrected for multiple testing. Relevant p-values are highlighted directly in the figure (*<0.05; **<0.01, ***<0.001) 