3.4.18.1 Brij 35 0.01%, 125% of initial activity 3.4.18.1 KCl 1 mM, 116% of initial activity 3.4.18.1 additional information CagA, upregulation of CTSX is more intense in tissue samples of patients with CagA+ Helicobacter pylori than in those with CagA- Helicobacter pylori 3.4.18.1 Triton X-100 0.01%, 123% of initial activity 3.4.18.1 Tween 20 0.01%, 130% of initial activity