Fig. 3From: BrkAutoDisplay: functional display of multiple exogenous proteins on the surface of Escherichia coli by using BrkA autotransporterSurface display of enzymes. a Trypsin accessibility assay of the displayed enzymes. b Surface display efficiency quantification by flow cytometry. c Enzymatic activity assays of the cells with displayed enzymes (CotA, EstPc and PalA) and the control group with empty pBAD. The enzymatic activities were calculated and calibrated (see “Methods”)Back to article page