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Western immunoblot assay with cell suspensions of NTHi recovered from two representative animals from the Freund's control group (lanes 1 and 2) and from the two HMW1/HMW2 immunized animals that developed infection (lanes 3 and 4), all probed with an HMW1/HMW2-specific monoclonal Ab pool. Values corresponding to molecular weight standards are given on the left.
