Why do amino acids change their structure in different pH?

Related questions

1. What is the difference between an amino acid and an amino acid residue?
2. How do you identify amino acids?
3. What are amino acid residues?
4. Which amino acids are acidic and basic?
5. What does the pKa tell you?
6. What is pKa and its significance?
7. What is physiological pH amino acids?
8. What is the difference between acidic amino acid and basic amino acid?
9. Does pKa change with concentration?
10. What is the composition of amino acids?

Tags

1. #zwitterion
2. #altered
3. #structure
4. #hydrogen
5. #hence
6. #acids
7. #charged
8. #changes
9. #being
10. #their
11. #solution
12. #change
13. #amino