Figure 8: MALDI ToF mass spectrum of antibody derived peptides in early fraction after incubation with protease. [A] mass spectrum range m/z 750–3500 of the early eluting fraction of anti-His antibody after incubation with trypsin. [B] mass spectrum of the early eluting fraction of anti-RA33 mAb after incubation with thermolysin. DHB was used as a matrix.