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.
Today is your final chance to celebrate outstanding contributions in biology — submit your nomination for the SEB Plenary Lecture Award to be presented at the SEB Annual Conference 2026 in Florence.
Protocol for experiment for lecturers
