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Abundances (% normalized abundance) of B1 biosynthesis genes (A) and of B1-related salvaging or transporter genes (B) fluctuate across LMO metagenomes. As mentioned in the text, thi4 and thiN are archaeal-associated functional analogs of thiG and thiE in bacteria. Sampling dates (in two digit year, month, and day format) linked to respective metagenomes are presented along the x axes.
