What Type of Bond is Formed When 2 Cysteine Residues

Question

What type of bond is formed when 2 cysteine residues react in proteins?
A)thioester bond
B)thioether bond
C)dithiol bond
D)disulfide bond

Accepted Answer

When two cysteine residues react in proteins, they form a disulfide bond. This bond is characterized by the oxidation of two thiol (-SH) groups to form a covalent bond (-S-S-), which helps to stabilize the protein's tertiary and quaternary structure.