3.4.22.43 5.5 - assay at 3.4.22.43 5.5 - protease inhibition assay at 3.4.22.43 5.5 6 - 3.4.22.43 5.5 6.5 assay at 3.4.22.43 5.7 - - 3.4.22.43 6.5 - plasminogen digestion assay at