That proteins are made up of amino acids/sequence of amino acids in protein was determined by a two time Nobel laureate

Options

A. Sanger
B. Summer
C. Pauling
D. Wilkinds

Answer

To answer the question regarding which two-time Nobel laureate determined that proteins are made up of amino acids and their sequence, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Scientist**: The scientist in question is Frederick Sanger. He is a notable biochemist and was awarded the Nobel Prize twice.

2. **Understand His Contributions**: Sanger's significant contributions to science include his work on the structure of proteins, particularly insulin. He was the first to determine the amino acid sequence of a protein.

3. **Nobel Prizes**: Frederick Sanger received his first Nobel Prize in Chemistry in 1958 for his work on the structure of proteins, especially insulin. He received his second Nobel Prize in Chemistry in 1980 for developing the Sanger method of DNA sequencing.

4. **Conclusion**: Therefore, the answer to the question is that Frederick Sanger determined that proteins are made up of amino acids and established the sequence of amino acids in proteins.

### Final Answer:
Frederick Sanger

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