Fig. 1.
HPLC purification of crude Rituxan homodimers.
Peak 1 = polymers; peak 2 = trimers; peak 3 = homodimers; peak 4 = monomers. The inset shows SDS-PAGE (4% to 15%) of the Rituxan monomers and homodimers separated by HPLC. Lane 1, Rituxan (monomer); lane 2, polymer (greater than 450 kd), HPLC fraction 1; lane 3, trimer (450 kd), HPLC fraction 2; lane 4, dimer (300 kd), HPLC fraction 3; lane 5, monomer (150 kd), HPLC fraction 4.