What is the papain classification?

Papain is classified as a cysteine protease enzyme. Cysteine proteases are enzymes that cleave proteins at specific amino acid residues and play essential roles in various biological processes, including digestion, immune response, and cell signaling. Papain specifically comes from the papaya fruit and is commonly used in various industries, including food, pharmaceuticals, and cosmetics, due to its protein-digesting properties.