1. As proteins unfold, the peptide bonds linking component amino acids are exposed. 2. The aspartyl residues are involved in the hydrolysis of the peptide bonds . 3. Cleavage of the peptide bond in tabtoxin releases T?L, the toxic moiety. 4. Protease degrades peptide bonds of the viral polyproteins, making the separate proteins functional. 5. All use different mechanisms to cleave the peptide bonds to begin protein degradation. 6. C domain forms a peptide bond between two amino acids, D-Phe and L-Pro. 7. For example, cyanogen bromide cleaves the peptide bond after a methionine. 8. Peptidyl transferase is a ribozyme that facilitates formation of peptide bonds during translation. 9. Degradation of the polymer occurs at the peptide bonds linking individual amino acids. 10. Factor XIa activates factor IX by selectively cleaving val peptide bonds .