The Pab Rb x human CD19 (B-lymphocyte Antigen CD19, B-lymphocyte Surface Antigen B4, Differentiation Antigen CD19, T-cell Surface Antigen Leu-12) (APC) antibody from United States Biological is a Rabbit Polyclonal antibody to CD19. This antibody recognizes Homo Sapiens, Human, and Mouse antigen. The Pab Rb x human CD19 (B-lymphocyte Antigen CD19, B-lymphocyte Surface Antigen B4, Differentiation Antigen CD19, T-cell Surface Antigen Leu-12) (APC) antibody has been shown to work in the following applications: Western Blot.