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Related to angiotensin I: angiotensin II
an·gi·o·ten·sin I (an'jē-ō-ten'sin),
A decapeptide of slightly variable sequence, depending on the animal source, formed from the tetradecapeptide angiotensinogen by the removal of four amino acid residues, a reaction catalyzed by renin; a peptidase cleaves off a dipeptide (histidylleucine) to yield angiotensin II, the physiologically active form.
angiotensin I An N-terminal decapeptide produced when renin acts on angiotensinogen. Angiotensin I is the precursor of angiotensin II but itself has no known physiologic role.
angiotensin I An N-terminal decapeptide produced when renin acts on angiotensinogen; A-I is the precursor of angiotensin II, but itself has no known physiologic role. See Angiotensinogen.
angiotensin I is converted to angiotensin II by the action of renal renin, causing generalized vasoconstriction and increased blood pressure