Fig. 5From: Modification of substrate specificity of l-arginine oxidase for detection of l-citrullinePurification of recombinant ArgOX/E486Q. Proteins were separated on a 10–20% gradient SDS-PAGE gel. Lane M, protein markers with sizes shown on the left; lane 1, ArgOX/E486Q (1 μg) after purification with size exclusion chromatography. Irrelevant sections of the gel image have been removed, and the removed areas are indicated with white linesBack to article page