Abstract

Two leading protein vaccine candidates from Nontypeable Haemophilus Influenzae (NTHi) are outer membrane proteins Omp26 and Protein D. When administered individually, Omp26 and Protein D elicit an antibody response in mice; when combined, the Protein D antibody response is significantly suppressed. Here, we describe a biochemical approach toward elucidating the interactions between Omp26 and Protein D, which we propose contribute to the suppression of Protein D‐specific antibody production. Preliminary data from enzyme‐linked immunosorbent assays and other standard protein detection methods suggest that Protein D binds strongly to Omp26 in vitro and perhaps in vivo in mice.

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