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Measurement of Plasma Renin Activity

 Last Update: 2020-11-23
 Source: Internet
 Author: User

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Measurement of angiotensin 1, released in plasma by the action of endogenous enzyme renin on endogenous substrate, angiotensinogen is described. Details are given for the generation of angiotensin 1 from plasma using controlled conditions of pH and temperature. A radioimmunoassay to quantify the generated material is then described using anti-angiotensin 1 antibody and iodinated angiotensin 1 as label. Separation of the antibody-bound fraction from the free is achieved using dextran-coated charcoal. Problems of cryoactivation of prorenin and the labile nature of angiotensin 1 are highlighted. Additional notes describe steps in the assay that are critical.

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