Store at 4°C in the dark. Under these conditions, the antibodies should have a shelf life of at least 12 months (provided they remain sterile). For longer storage periods, dilute the antibodies with sterile glycerol and store at -20°C. Do not freeze these antibodies unless you want to store them for longer periods of time.
Eggs from at least 20 chickens were purified from the yolks using a proprietary method. The IgY fraction was then dialyzed against phosphatebuffered isotonic saline. Sodium azide was then added and the preparation was filter-sterilized (0.45 μm filter).