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Transmission electron micrographs of chemically fixed and cryosectioned “Ca. Methylomirabilis oxyfera” cells. The immunogold localization of affinity-purified antiserum directed against XoxF1 is shown (black and white arrows). Longitudinal (A) and cross (B) sections were blocked with 1% BSA and treated with 50-fold-diluted α-XoxF1 serum. Abbreviations: cp, cytoplasm; pp, periplasm; cm, cytoplasmic membrane; om, outer membrane. Scale bars, 200 nm.
