Question

While creating a permanent on a student, a hairdresser accidentally spills some ammonium thioglycolate (also known as perm salt) onto the student’s skin. Ammonium thioglycolate reduces disulphide bonds, which are formed by which amino acid?
1. Methionine. 2. Threonine. 3. Cysteine. 4. Serine.

Answer 1

3. Cysteine