title: A method for the estimation of the activity of the inhibitor of the first component of complement.
abstract: The activated first component of complement (CI) possesses an esterase activity in vitro which will hydrolyse an ester of tyrosine to release H+. The activity of the serum inhibitor of C1 esterase may be measured by monitoring its ability to prevent H+ release under standard conditions. This paper describes a method of measuring such activity, monitoring H+ release by the use of either an acid base indicator of pH meter.
mesh_terms: D003124:Colorimetry / Q000379:methods; D003174:Complement C1 Inactivator Proteins / Q000097:blood*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D008722:Methods
chemical_list: D003174:Complement C1 Inactivator Proteins