Other reports previously hinted at the importance of the sulfonic groups in phage-interacting systems (both colloidal and molecular) . However, just the presence of sulfonic groups was clearly not enough to explain the observed phenomena -sodium dodecyl sulfate (SDS), 2-(N-morpholino)ethanesulfonic acid (MES), and sodium toluene sulfonate (TSA) did not provide any protection against UV to neither phages nor bacteria (Figure ). Only more complex sodium 4-phenol sulfonate (sodium hydroxybenzenesulfonate; HBSA), sodium 2naphthol-6-sulfonate (NSA), sodium isatin-5-sulfonate (ISA) offered beneficial properties for phage stabilization.