Rabbit purified IgG fraction of antiserum to Listeria. The immunogen is Listeria monocytogenes ATCC strain 43251. This serum has not been absorbed and may cross-react with related microorganisms. Purity is >95% IgG and is supplied at a concentration of 4-5mg/mL in 0.01M PBS, pH 7.2 with 0.1% sodium azide. Recommend short term storage at 2-8°C or frozen for long term.