Use the three-letter abbreviations to name all tripeptides containing methionine, isoleucine, and lysine.

Name: Chemistry
Author: McMurry
ISBN: 9781292336145

검증된 단계별 안내

Step 1: Identify the three-letter abbreviations for each of the amino acids involved. Methionine is abbreviated as 'Met', isoleucine as 'Ile', and lysine as 'Lys'.

Step 2: Understand that a tripeptide is a peptide consisting of three amino acids linked by peptide bonds. The order of these amino acids matters, as it determines the identity of the tripeptide.

Step 3: List all possible permutations of the three amino acids. Since there are three different amino acids, there are 3! (3 factorial) possible permutations, which equals 6.

Step 4: Write down each permutation using the three-letter abbreviations. The possible tripeptides are: Met-Ile-Lys, Met-Lys-Ile, Ile-Met-Lys, Ile-Lys-Met, Lys-Met-Ile, and Lys-Ile-Met.

Step 5: Verify that all permutations are unique and correctly represent different sequences of the amino acids. Each sequence corresponds to a distinct tripeptide.

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Amino Acids and Their Abbreviations

Amino acids are the building blocks of proteins, and each has a specific three-letter abbreviation. Methionine (Met), Isoleucine (Ile), and Lysine (Lys) are essential amino acids that play critical roles in protein synthesis and metabolism. Understanding these abbreviations is crucial for naming peptides accurately.

Peptide Formation

Peptides are formed by the linkage of amino acids through peptide bonds, which occur between the carboxyl group of one amino acid and the amino group of another. In the case of tripeptides, three amino acids are combined in a specific sequence, and the order of these amino acids affects the peptide's properties and function.

Permutations of Amino Acids

When naming tripeptides, the order of amino acids matters, as different sequences can lead to different peptides. For methionine, isoleucine, and lysine, the total number of unique tripeptides can be calculated using permutations, considering that the same amino acids can appear in different orders, resulting in distinct tripeptide names.