Give one example of sulphur containing amino acid

Answer

**Step-by-Step Text Solution:**

1. **Understanding Amino Acids**: Amino acids are the building blocks of proteins. There are 20 standard amino acids that are commonly found in proteins.

2. **Identifying Sulfur-Containing Amino Acids**: Among these 20 amino acids, some contain sulfur. The two main sulfur-containing amino acids are:
- Methionine
- Cysteine

3. **Example of a Sulfur-Containing Amino Acid**: For this question, we can provide either methionine or cysteine as an example.

4. **Details about Methionine**: Methionine is known as the initiating amino acid because it plays a crucial role in the initiation of protein synthesis in eukaryotic cells.

5. **Details about Cysteine**: Cysteine is important for various biological functions and is found in keratin, which is a key structural protein in hair, skin, and nails. It also plays a role in the formation of collagen.

6. **Conclusion**: Therefore, one example of a sulfur-containing amino acid is **methionine** or **cysteine**.

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