Chromatographic runs (FPLC). (A) Cation exchange chromatography on SP-Sepharose. (B) Cation exchange chromatography on MonoS. (C) Cation exchange chromatography on MonoS jrPPO1(Asp101 → Pro444). (D) Cation exchange chromatography on MonoS jrPPO1(Asp101 → Arg445). Legend: , UV absorbance at 280 nm [mAU]; , UV absorbance at 410 nm [mAU]; , monophenolase activity [U/ml]; , gradient [% buffer B]; , conductivity [mS/cm] (f = ∼1.5).