Sulfoacetaldehyde as the point of convergence of the degradative pathways for sulfoacetate, isethionate, and taurine and the degradative pathway of sulfoacetaldehyde in C. necator H16. Taurine dehydrogenase (TauXY) and isethionate dehydrogenase (IseJ) are inducible, membrane-bound, cytochrome c-coupled enzymes that have not been purified; TauE is a sulfite exporter, located in the cytoplasmic membrane (CM) (19–21, 50). Pta, phosphate acetyltransferase.