A peptide consisting of three amino acid residues is called a tri-peptide, e.g. Glutathione (GSH), a tri-peptide with the sequence γ-glutamyl cysteinyl glycine. This peptide has an... A peptide consisting of three amino acid residues is called a tri-peptide, e.g. Glutathione (GSH), a tri-peptide with the sequence γ-glutamyl cysteinyl glycine. This peptide has an important role in antioxidant defenses. Angiotensin, a peptide hormone that affects blood pressure, is another example of a peptide with physiological importance, which has the following sequence of amino acids: Asp-Arg-Val-Tyr-Ile-His-Pro-Phe-His-Leu. By convention, the amino terminus (N-terminus) is taken as the first residue, and the sequence of amino acids is written from left to right.
Understand the Problem
The question presents information about peptides, including examples like glutathione and angiotensin, and discusses their structures and physiological importance. It is likely asking for a summary or explanation of the text regarding these peptides.
Answer
A tripeptide like Glutathione (GSH) is vital for antioxidant defense; Angiotensin affects blood pressure.
The image explains that a peptide with three amino acids is called a tripeptide. Glutathione (GSH) is an example, consisting of γ-glutamyl cysteinyl glycine, important for antioxidant defense. Angiotensin, a hormone affecting blood pressure, has a sequence: Asp-Arg-Val-Tyr-Ile-His-Pro-Phe-His-Leu.
Answer for screen readers
The image explains that a peptide with three amino acids is called a tripeptide. Glutathione (GSH) is an example, consisting of γ-glutamyl cysteinyl glycine, important for antioxidant defense. Angiotensin, a hormone affecting blood pressure, has a sequence: Asp-Arg-Val-Tyr-Ile-His-Pro-Phe-His-Leu.
More Information
Tripeptides have various biological roles, with Glutathione playing a key part in cellular antioxidant defense, and Angiotensin being crucial for blood pressure regulation.
Tips
A common mistake is confusing the order of amino acids or not following the N-terminus convention when writing sequences.
Sources
- Tripeptide - Wikipedia - en.wikipedia.org
- Glutathione Homeostasis and Functions: Potential Targets for ... - pmc.ncbi.nlm.nih.gov
- peptides and proteins - STUDENT CONSULT - aris.gusc.lv
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