Polyphenol oxidase (PPO) enzyme is of great commercial interest because it is related to the browning of fruits. In this practical spanning two weeks, we will use classical biochemical techniques to extract a PPO enzyme from a banana or apple, perform an assay for PPO activity and protein content, and assess data to discuss reproducibility in science.
Nominate outstanding scientists for the SEB President’s Medals by 22 October or put forward candidates for the SEB Annual Lecture Awards by 29 October 2026.
Protocol for experiment for lecturers
