The Respiratory Allergy Panel Region 5 measures IgE antibodies to common molds (Alternaria, Aspergillus, Cladosporium, Penicillium), grasses (Bermuda, timothy), trees (birch, oak, cedar, cottonwood, walnut, pecan/hickory, sycamore, white ash, mulberry, elm, maple), weeds (ragweed, pigweed, sorrel, Russian thistle), and indoor allergens (cat and dog dander, dust mites, cockroach, mouse proteins). This panel helps identify respiratory allergy triggers.