The D. Pter. Allergen is a lyophilized extract from GREER LABORATORIES INC designed for research on dust mite allergies. This stable, freeze-dried formulation is ideal for allergen-specific immunotherapy and provides critical data for understanding allergic reactions. It is characterized by low endotoxin levels, a fill volume of 2.5 mL, and significant protein content, making it a reliable choice for both *in vitro* and *in vivo* testing.