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A method for the estimation of the activity of the inhibitor of the first component of complement.
  1. A M Smith,
  2. R A Thompson


    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.

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