Siemens Diagnostics' proprietary liquid allergens are the key to making IMMULITE® 2000 and IMMULITE® 2500 Allergy tests sensitive, specific and reliable. The soluble polymer/copolymer support for the allergens increases the number of binding sites and their accessibility to allergen-specific IgE antibodies. Enzyme-enhanced chemiluminescent signal detection provides increased sensitivity and the proprietary wash technique enhances specificity.