Amino Acids (AA)

<p>Angiotensin I/II (3-8) H-Val-Tyr-Ile-His-Pro-Phe-OH is a peptide that has physiological effects and is used as a drug. It is an active analogue of the peptide hormone angiotensin II, which regulates blood pressure and fluid volume. Angiotensin I/II (3-8) H-Val-Tyr-Ile-His-Pro-Phe-OH binds to angiotensin receptors and stimulates the release of calcium ions from cytosolic stores in cells, leading to increased muscle contractions and vasoconstriction. This drug may also have effects on dopamine levels in the brain, locomotor activity, and biochemical properties such as enzyme activity or protein binding.br&gt;<br>Angiotensin I/II (3-8) H-Val-Tyr-Ile-His Pro Phe OH has been shown to reduce the level of dopamine</p>

<p>H-Leu-Pro-Pro-OH is a synthetic tripeptide that has been shown to increase endothelial function in humans. The peptide is thought to work by increasing nitric oxide production and by inhibiting angiotensin II production. H-Leu-Pro-Pro-OH also reportedly increases uptake of glucose in the intestine and decreases blood pressure. In placebo-controlled, crossover studies, H-Leu-Pro-Pro-OH increased plasma concentrations of angiotensin I and II, suggesting that it may be a potent inhibitor of angiotensin converting enzyme (ACE).</p>