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Purified bacterial recombinant fusion proteins block TNF (Upper) and LTα (Lower) cytolysis of mouse L cells. Crystal violet staining was used to determine the percent of cells viable after 24-hr treatment with human TNF (▴) or LTα (▾) and when human TNF or LTα are mixed with MBP-CPV (•), MBP-ECT (▪), or MBP (⧫).
