C₄

English C₄ carbon fixation Noun - en biochemistry Designating a type of photosynthesis or carbon fixation, or a plant using such a process. en 2021 Caroline Bowsher; Alyson Tobin Plant Biochemistry The enzyme responsible for C₄ fixation is PEP carboxylase. en 2022 Thomas Halliday (writer) Thomas Halliday Otherworlds 29 Penguin 2023 Since C₄ plants have become more prevalent, and because they are poorer sources of nutrition, herbivores have had to adapt their feeding behaviour to the changing flora.