Exceptional Sensitivity of XP® Monoclonal Antibodies

While specificity is the most important criterion for a great antibody, sensitivity can become important when research samples are limited or a protein is expressed at low endogenous levels. We compared Phospho-GSK-3β (Ser9) (D85E12) XP® Rabbit mAb #5558, and Phospho-S6 Ribosomal Protein (Ser235/236) (D57.2.2E) XP® Rabbit mAb #4858 with competitor products using western blot analysis. We also compared #4858 with other Cell Signaling Technology rabbit monoclonal antibodies #4856 and #4857.