Aparticular protein contains an abundance of disulfide bonds. placing this protein in conditions would break the disulfide bonds and thus alter the protein's conformation.

Placing this protein in DENATURATION conditions would break the disulfide bonds and alter the protein's conformation.
Denaturation conditions refers to those conditions under which a protein will be negatively affected and undergo a process that will change its functionality. Factors that can bring about denaturation include: temperature, heat, pH, etc.

$100. 125 x 0.20 = 25125 - 25 = $100