convertase

https://doi.org/10.1351/goldbook.13047
Enzyme activity that converts complement protein into its reactive form by cleaving it.
Note: Generation of the C3/C5 convertase is the pivotal event in complement activation.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1149 [Terms] [Paper]