Ligand cross-feeding resolves bacterial vitamin B12 auxotrophies

Cobalamin (vitamin B 12 , herein referred to as B 12 ) is an essential cofactor for most marine prokaryotes and eukaryotes 1 , 2 . Synthesized by a limited number of prokaryotes, its scarcity affects microbial interactions and community dynamics 2 – 4 . Here we show that two bacterial B 12 auxotroph...

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