The one letter code for the amino acid tryptophan is

Options

A. G
B. V
C. W
D. H

Explanation

To determine the one-letter code for the amino acid tryptophan, we can follow these steps:

### Step 1: Identify the Amino Acid
- The amino acid in question is tryptophan.

### Step 2: Recall the One-Letter Code System
- In biochemistry, amino acids are often represented by one-letter codes for convenience. Each amino acid has a specific one-letter code.

### Step 3: Look Up the One-Letter Code for Tryptophan
- The one-letter code for tryptophan is commonly known and can be found in standard biochemical references.

### Step 4: Confirm the One-Letter Code
- For tryptophan, the one-letter code is 'W'. This is consistent across various biochemical literature.

### Conclusion
- Therefore, the one-letter code for the amino acid tryptophan is **W**.

### Answer
- The correct option is **Option 3: W**.

---