The Phospho-Rb (Ser807/811) (D20B12) XP ® Rabbit mAb (Pacific Blue ™ Conjugate) Antibody from Cell Signaling Technology is a Rabbit Monoclonal antibody to RB1. This antibody recognizes Homo Sapiens, Human, Mouse, Rat, and Non-Human Primate antigen. The Phospho-Rb (Ser807/811) (D20B12) XP ® Rabbit mAb (Pacific Blue ™ Conjugate) Antibody has been shown to work in the following applications: Flow Cytometry.