21. Inteins often function with the help of a catalytic cysteine . 22. The redox state of the cysteines determines the fluorescent properties of roGFP. 23. Instead it arises via a post transcriptional modification of serine and cysteine . 24. This sequence contains 6 cysteine residues that form three intramolecular disulfide bonds. 25. Cysteine proteases are used as an ingredient in meat tenderizers.26. Instead, a serine replaces the cysteine at this position. 27. TCEP is particularly useful when labeling cysteine residues with maleimides. 28. There are two conserved cysteine residues important for thiolase activity. 29. It encodes the most abundant extracellular inhibitor of cysteine proteases. 30. The most common reaction with amino acids is cysteine oxidation.
