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EDAX spectra of Pseudomonas sp. strain B4 grown in a defined medium supplemented with biphenyl as the sole carbon source. (A) Electron micrograph of a single unstained cell used to analyze the chemical composition of different areas (indicated by arrows). (B) Spectrum obtained from an electron-dense body. (C) Spectrum of a cytoplasmic area. The asterisks indicate Ka peak intensities of phosphorus and oxygen.
