Identify the N-terminal and C-terminal amino acids of the peptide.

검증된 단계별 안내

Examine the peptide structure provided in the image. Identify the amino acid at the N-terminal (the end of the peptide with a free amino group, -NH2) and the amino acid at the C-terminal (the end of the peptide with a free carboxyl group, -COOH).

Locate the N-terminal amino acid by finding the amino acid with a free -NH2 group that is not involved in a peptide bond.

Locate the C-terminal amino acid by finding the amino acid with a free -COOH group that is not involved in a peptide bond.

Write down the names of the amino acids identified at the N-terminal and C-terminal based on their side chains and structures.

Double-check the structure to ensure that the identified N-terminal and C-terminal amino acids are correct and consistent with the peptide sequence.

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주요 개념

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

Peptide Structure

A peptide is a short chain of amino acids linked by peptide bonds. The sequence of amino acids determines the peptide's properties and functions. Each amino acid has an amino group (N-terminus) and a carboxyl group (C-terminus), which are critical for understanding the peptide's orientation and reactivity.

N-terminal and C-terminal

The N-terminal (amino terminus) refers to the end of the peptide chain that has a free amino group, while the C-terminal (carboxyl terminus) is the end with a free carboxyl group. Identifying these ends is essential for understanding the peptide's directionality and how it interacts with other molecules.

Amino Acid Sequence

The specific order of amino acids in a peptide is known as its sequence, which is crucial for determining its structure and function. The sequence is typically read from the N-terminal to the C-terminal, and any changes in this sequence can significantly affect the peptide's biological activity.