Rabbit Serum (Normal) is recommended for use as control serum or reference material for rabbit serum proteins. Reagent provided is a pool of undiluted whole sera from healthy rabbits (Danish Whites) provided in liquid form, and containing 15 mmol/L NaN3. A fine precipitate of serum proteins may form in the serum. This precipitate may be removed, if required, by passing the serum through a 0.2 µm filter immediately before use.