Comparison of the in vitro effects of Lym-2 versus Lym-1 on various B-cell lymphoma cell lines. Briefly, lymphoma cell lines were incubated with 1 μg/mL of antibodies that were previously immobilized to the plates with goat-antimouse IgG1 (for Lym-2) or goat-antimouse IgG2a (for Lym-1). Data are presented as percent of growth compared with crosslinked control mouse IgG1 or mouse IgG2a, and are representative of three experiments. Lym-1 inhibited the Raji Burkitt's cell line and Michel anaplastic cell line but not the RL diffuse large cell line nor the TU-2C EBV-induced cell line.