The att is an operon composed of nine genes: , a transcriptional regulator, , a gene including domains for transmembrane localization (perhaps needed for exportation of compounds made by other att genes), and several genes attA-.
The att comprises nine genes including , a transcriptional regulator, , a gene with transmembrane localization domains (which might be necessary for the exportation of substances produced by other att genes), and additional genes such as attA-.