TIL about fluorinase, the only known enzyme catalyzing (unsurprisingly) formation of a C-F bond: https://en.wikipedia.org/wiki/Fluorinase
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@whitequark well, now I know where how all those quirky and uncommon biological organofluorine compounds like fluoroacetic acid come from
@whitequark https://en.wikipedia.org/wiki/4-Fluoro-L-threonine is one. Fluorocitric acid is another
@mona what are others?