A summary of Tat translocase subunits (A/E, B, C) present in each bacterial class surveyed for this study and the most common arrangement of these genes in tat operons.

§tat genes are listed as single letters A to C and combinations written together indicate their presence at the same tat operon locus. Bidirectional ↔ arrows indicate that the Tat component genes are not found in the same operon (separate loci). tat genes (A, B or C) found in parentheses indicate an optional occurrence in the tatC locus.