Partial characterization of affinity purified excretory-secretory protease from Setaria digitata.

Excretory-secretory protease of S. digitata released along with the microfilariae (mf) during hatching has been purified by affinity chromatography. No other activity could be detected in the affinity purified material. Homogeneity is checked by native PAGE. It has a pH optimum of 5.4 and a molecular weight of 70 kD. The purified material showed positivity against antibodies raised against ES material.