MECHANISMS OF ACTIVATION OF C'1 ESTERASE IN HEREDITARY ANGIONEUROTIC EDEMA PLASMA IN VITRO

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Abstract
The generation of C'1 esterase activity in siliconed plasma obtained from individuals with hereditary angioneurotic edema in remission tends to occur spontaneously, but can be hastened during its incubation with preparations of activated Hageman factor. This effect of activated Hageman factor could not be shown during its incubation with normal siliconed plasma, nor could consumption of normal serum inhibition of C'1 esterase be clearly shown.