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formate transporter FocA FocA (formate channel A) forms a pentameric formate-selective channel through the plasma membrane. The focA gene is largely restricted to Proteobacteria and occurs adjacent to genes for pyruvate formate lyase (PFL) and the PFL activase, a radical SAM protein. FocA is homologous to a nitrite transport protein, NirC. [Transport and binding proteins, Carbohydrates, organic alcohols, and acids]
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