"I have used a wide variety of secondaries and Jackson ImmunoResearch has consistently been the best. The fluorophores are bright and stable and their selective (x reactivity removed) secondaries have always shown species specificity in multiple labeling."
Janet Duerr, Ohio University
"Without question, I can always turn to Jackson ImmunoResearch secondary antibodies for ECL detection of any primary antibody! They produce great signal at low dilutions, last for years even through bad laboratory practice like repeatedly using the same tube every time, and come in a variety of species flavors."
W Thompson, OSHU
Fab fragments can be used to block endogenous immunoglobulins on cells, tissue, or other surfaces, and to block the exposed immunoglobulins in multiple labeling experiments using primary antibodies from the same species.