Agarose gel electrophoresis of DNA from BL cells treated with 38.13 anti-CD77 MoAb. BL cells were incubated for 24 hours in Petri dishes that had been previously coated with RARa and 38.13 MoAb (A) or with RARa alone (B). DNA was then prepared and analyzed by 2% agarose gel electrophoresis. Lane 1, CD77⁺ BL2 cells; lane 2, CD77⁺ Ramos cells; lane 3, CD77⁺ Daudi cells; lane 4, CD77⁺ MUTU I cells; lane 5, CD77⁻ Namalwa cells; lane 6, CD77⁻ MUTU III cells.