Question

If side chains of amino acids interact with each other, which of the following would be termed as a salt bridge?

• A. Tyr - Phe
• B. Cys - Cys
• C. Lys - Glu
• D. Ala - Val

Hint:

Salt bridges are formed between positively charged (basic) and negatively charged (acidic) amino acids and are crucial for protein stability.

Answer 1

The Correct Option is C

A salt bridge is a type of non-covalent interaction between oppositely charged side chains, typically between a basic amino acid (like Lysine) and an acidic amino acid (like Glutamate). In this case, the Lys - Glu pair forms a salt bridge.