Western blot analysis of rCsproSERPIN and rCsproSERPIN3 in adult and metacercaria. Lane 1, soluble antigen of C. sinensis adult probed with naive rat serum; lane 2, soluble antigen of C. sinensis metacercaria probed with naive rat serum; lane 3, soluble antigen of C. sinensis adult probed with anti-rCsproSERPIN rat serum; lane 4, soluble antigen of C. sinensis metacercaria probed with anti-rCsproSERPIN rat serum; lane 5, soluble antigen of C. sinensis adult probed with anti-rCsproSERPIN3 rat serum; lane 6, soluble antigen of C. sinensis metacercaria probed with anti-rCsproSERPIN3 rat serum.