Discuss the unique properties of kiwifruit enzymes, particularly actinidin, and their role in digestion and food processing.

Kiwifruit contains natural enzymes, including actinidin, which is a cysteine protease that helps break down proteins in the digestive system. Actinidin is similar to papain in papaya and bromelain in pineapple and is known for its ability to tenderize meat and improve digestion. In addition to its digestive properties, actinidin has applications in food processing, such as meat tenderization, dairy processing, and beverage clarification, where it enhances flavor, texture, and shelf life.