Question

What is the sequence of the peptide?

1) glu–his–trp–ser–gly–leu–arg–pro–gly
2) gly–leu–arg–pro–gly–glu–his–trp–ser
3) trp–ser–gly–leu–arg–pro–gly–glu–his
4) arg–pro–gly–glu–his–trp–ser–gly–leu

Answer 1

The sequence of the peptide is: gly-leu-arg-pro-gly-glu-his-trp-ser. Peptides are chains of amino acids, and their sequences are determined by the order of the amino acids in the chain. The correct sequence can have implications for the function and structure of the peptide. The correct answer is 2) gly–leu–arg–pro–gly–glu–his–trp–ser.

Step-by-step explanation:

The sequence of the peptide is: gly-leu-arg-pro-gly-glu-his-trp-ser. Peptides are chains of amino acids, and their sequences are determined by the order of the amino acids in the chain. In this case, the sequence starts with glycine, followed by leucine, arginine, proline, glycine, glutamic acid, histidine, tryptophan, and serine. It is important to note that the correct sequence can have implications for the function and structure of the peptide. Each amino acid is typically represented by a three-letter abbreviation in the sequence.

To describe how sequences are named: for a dipeptide of alanine and glycine, it's called alanyl glycine, and for a tripeptide like glycine, histidine, and lysine, it's glycylhistidy llysine. In question 69, inserting arginine into the protein sequence between leucine and methionine would change the peptide's properties – potentially affecting its structure, function, and interactions with other molecules. Therefore, the correct answer is 2) gly–leu–arg–pro–gly–glu–his–trp–ser.