Fig. 3From: Modification of substrate specificity of l-arginine oxidase for detection of l-citrullinePurification of recombinant l-arginine oxidase (ArgOX). Proteins were separated on a 10–20% gradient sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) gel. Lane M, protein markers with sizes shown on the left; lane WT, ArgOX (1 μg) after purification with size exclusion chromatographyBack to article page