The Respiratory Allergy Panel Region 11 measures IgE antibodies to common allergens, including molds (Alternaria, Aspergillus, Cladosporium, Penicillium), grasses (Bermuda, timothy), trees (alder, oak, cedar, cottonwood, elm, maple, olive, mulberry), weeds (ragweed, mugwort, pigweed, Russian thistle, sheep sorrel), and indoor allergens (cat and dog dander, dust mites, cockroach, mouse proteins). This panel helps identify respiratory allergy triggers.