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Transmission electron micrograph of high-pressure frozen and cryosubstituted cell of Prosthecobacter dejongeii, showing prostheca (PT), an intracytoplasmic membrane (ICM) surrounding a pirellulosome region containing a condensed fibrillar nucleoid (N), and a paryphoplasm region (P). Inset: enlarged view of region of cell outlined in the white box showing cytoplasmic membrane (CM), paryphoplasm (P) and ICM. Bar – 500 nm.
