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Detection of allergens in mould and mite preparations by a nitrocellulose electroblotting technique.

The allergen composition of moulds (Alternaria alternata and Aspergillus fumigatus) and mites (Dermatophagoides pteronyssinus and Dermatophagoides farinae) was studied by electroblotting. The allergens were separated by SDS-gPAGE and transferred to a nitrocellulose membrane by electroblotting. Specific IgE antibodies directed against mould and mite allergens were utilized as probes to detect the allergens. The bands were localized on the nitrocellulose membrane by means of enzyme- or isotope-labelled antibody. Circulating specific IgE antibodies in mould and mite sensitive patient sera were also analyzed and characterized with respect to their IgE specificity. Under appropriate experimental conditions this electroblotting technique could also be used for quantitation of individual allergens by scanning the isotope- or enzyme-stained nitrocellulose strips.