They produce an extensive arsenal of defensive antimicrobial proteins and peptides including lysozyme, myeloperoxidase, neutrophil elastase, cathepsins, and the alpha- and beta-defensins. Neutrophils also form extracellular traps, web-like structures composed of DNA, histones and various antimicrobial proteins that are extruded from the neutrophil in order to ensnare and kill extracellular pathogens. In mice, neutrophils comprise ~10% of circulating white blood cells, so unlike humans, it is usually not possible to isolate even one million neutrophils from a single mouse from peripheral blood. Cayman’s Neutrophil (mouse) Isolation Kit is designed to provide a streamlined method for isolating mouse neutrophils by peritoneal lavage. The Cayman Chemical Neutrophil (mouse) Isolation Kit is distributed in Australia and New Zealand by Sapphire Bioscience.