Questions: What type of interaction would you expect from the following R groups in a tertiary structure? arginine and aspartate serine and glutamine leucine and alanine Hydrophobic Hydrophilic Salt bridge Hydrogen bond Disulfide bond interaction interaction

The answer is as follows:

1. Arginine and aspartate: Salt bridge
2. Serine and glutamine: Hydrogen bond
3. Leucine and alanine: Hydrophobic interaction

Explanation:

1. Arginine and aspartate: These two amino acids can form a salt bridge. Arginine has a positively charged side chain, while aspartate has a negatively charged side chain. The electrostatic attraction between these opposite charges forms a salt bridge.

2. Serine and glutamine: Both of these amino acids have side chains capable of forming hydrogen bonds. Serine has a hydroxyl group (-OH), and glutamine has an amide group (-CONH2). These groups can interact through hydrogen bonding.

3. Leucine and alanine: Both of these amino acids have nonpolar side chains, making them hydrophobic. Leucine has a larger hydrophobic side chain compared to alanine, but both will interact through hydrophobic interactions in the tertiary structure of a protein.