11. This domain contains ten conserved cysteines that form five disulphide bridges. 12. The zinc ion is chelated by one hisitidine and three cysteine . 13. Cysteine residues bind to the catalytic zinc keeping the protein latent.14. The methyl-acceptor residue in the protein is a cysteine . 15. This enzyme participates in cysteine metabolism and aminoacyl-trna biosynthesis. 16. In the human BiP, there are two highly conserved cysteines . 17. The primary structure contains 28 cysteine residues forming multiple disulfide bonds. 18. There are six conserved cysteines all involved in intrachain disulfide bonds. 19. Cysteine -string protein increases the calcium sensitivity of neurotransmitter exocytosis.20. Glutathione has antioxidant properties since the thiol group in its cysteine Kinetoplastids.
