Fig. 3.

Immunoblot of commercial and self prepared extract with a human serum (RAST-class 4). Commercial and self prepared extracts were separated using SDS-PAGE, blotted and developed with the serum of a farmer. The following marker and samples were applied: lane 1 molecular weight marker, lane 2 commercial extract A, lane 3 commercial extract B, lane 4 commercial extract C, lane 5 commercial extract D, lanes 6, 7 self prepared extract from Holstein-Friesian. The following amounts of protein were applied: lanes 2–6: 20 μg, lane 7: 60 μg