Carbon isotope fractionation by an ancestral rubisco suggests biological proxies for CO2 through geologic time should be re-evaluated
R. Z. Wang, R. J. Nichols, A. K. Liu, A. I. Flamholz, J. Artier, D. M. Banda, D. F. Savage, J. M. Eiler, P. M. Shih, W. W. Fischer
The paper measures carbon isotope fractionation of an ancestral rubisco in cyanobacteria, showing that evolutionary changes in photosynthesis physiology, not just atmospheric CO2, affect the carbon isotope record.
bioRxiv · Jun 22, 2022 · PreprintEvolutionary Biology