Protein denaturation refers to the phenomenon that the natural conformation of biological macromolecules is destroyed, resulting in the loss of their biological activity. When proteins are exposed to light and heat, the stimulus bond is destroyed, which causes the protein's biological activity to be lost. When the protein is heated, it will degenerate and precipitate. So if you get blood on your clothes, what's the best way to deal with it? ['Wash with warm water as soon as possible.', 'Wash with boiling water as soon as possible.', 'Wash with a strong detergent.', 'Wash with cold water as soon as possible.']