In vitro cytotoxicity of SGN-CD19B on malignant B-cell lines. SGN-CD19B activity was evaluated across a broad panel of B-NHL and B-ALL cell lines using a 96-hour cell viability assay. Malignant B-cell lines are plotted based on IC₅₀ values (y-axis). The x-axis shows ranking of SGN-CD19B sensitivity from lowest to highest. Unique symbols denote tumor type or subtype. Double-hit or triple-hit lymphoma cell lines, as reported in the literature,¹⁸  are indicated on the x-axis using an asterisk.