Thin section showing nucleolus of a Human neuroblastoma SK-N-SH cell imaged with a FEI Tecnai 20 energy filtered electron microscope at 200 KV and a 20 eV energy window. Overlay of net phosphorus distribution (yellow) and nitrogen minus phosphorus (blue). Dotted area labelled GC is granular component of the nucleolus
Net phosphorus distribution computed from images taken with energy losses of 155 eV and 155 eV bracketing the phosphorus 'edge', and corresponding nitrogen distribution computed from images taken at 385 eV and 415 eV. See Fig 7E in Politz et al., 2005 Mol Biol Cell 16:3401-3410.
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