Isotype Control For Rabbit Primary Ab Properly controlled IHC stains require that a non-immune immunoglobulin equivalent of the primary antibody be run on the sample tissue in the same way that the primary antibody is run. Any positive staining would indicate that the primary antibody stain may not be specific. These reagents can be used as negative isotype controls for our predilute primary antibodies. Host: Rabbit SubClass (Isotype): Multi Label or Dye: Unconjugated Product Size: 18 mL Shipping Condition: Wet Ice Regulatory Statement: For Research Use Only. Not for use in diagnostic procedures. Store in refrigerator (2–8°C).