Description_x000D_ Immunogen_x000D_ Purifed Shiga-like toxin from E. coli H30._x000D_ Physical form_x000D_ Supplied as a solution in 0.01 M phosphate buffered saline pH 7.4 and 15 mM sodium azide as a preservative._x000D_ Other Notes_x000D_ In order to obtain best results in different techniques and preparations we recommend determining optimal working concentration by titration test.