Freezing experiments of aqueous extracts containing fungal ice nucleators from F. acuminatum. (A) Shown is the cumulative number of ice nucleators per unit mass of F. acuminatum (Nm) for extracts containing ice nucleators from spores and mycelial surfaces (blue) and for ice-affinity purified ice nucleators (orange). (B) Cryomicroscopic image of a hexagonal ice crystal grown in a F. acuminatum IN extract. Credit: Proceedings of the National Academy of Sciences (2023). DOI: 10.1073/pnas.2303243120
