FAbs and Other Antibody Fragments

Generation of Fab and F(ab’)2 fragments from monoclonal antibodies can present unique challenges. There is variation among species, subclasses of Abs (e.g., IgG1, G2a, G2b, etc.), and even individual antibodies within a subclass (with respect to the enzyme used, rate of digestion, and the incubation period to obtain maximum yields of Fab or F(ab’)2). Additionally, digestion may affect the antigen binding activity of the antibody. Thus, digestion conditions must be optimized for each unique antibody and the purification and protein sizing analytical method must be able to resolve the desired fragments.

Antibody Solutions has the expertise to optimize the production of Fab or F(ab’)2 from human and rabbit IgG as well as mouse and rat monoclonal antibodies. We offer custom-tailored fragmentation services for different antibody species and isotypes as well as conjugation of antibody fragments (see our conjugation page for more information).