A procedure was developed for detecting heparinase activity on heparin agar plates. The method is based on the differential precipitation of heparin and heparinase-generated heparin fragments by protamine sulfate. Heparinase activity is detected by the presence of clear zones against a white background. This method can be used to screen for the expression of recombinant heparinase and to identify Flavobacterium heparinum mutants expressing heparinase constitutively.
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Zimmermann et al. (1990) studied this question.
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