Nucleolus
Three regions of the nucleolus are visible in this electron micrograph. The pale areas are the nucleolar organizing centers. The most dense areas are the pars fibrosa, which contain newly synthesized primary transcripts of RNA genes. The pars granulosa has a granular appearance and contains maturing ribosomal particles. 30,000x
Nucleus
Three regions of the nucleolus are visible in this electron micrograph. The pale areas are the nucleolar organizing centers. The most dense areas are the pars fibrosa, which contain newly synthesized primary transcripts of RNA genes. The pars granulosa has a granular appearance and contains maturing ribosomal particles. 30,000x
- Nucleolus
Three regions of the nucleolus are visible in this electron micrograph. The pale areas are the nucleolar organizing centers. The most dense areas are the pars fibrosa, which contain newly synthesized primary transcripts of RNA genes. The pars granulosa has a granular appearance and contains maturing ribosomal particles. 30,000x
-- Nucleolar organizing centers
Three regions of the nucleolus are visible in this electron micrograph. The pale areas are the nucleolar organizing centers. The most dense areas are the pars fibrosa, which contain newly synthesized primary transcripts of RNA genes. The pars granulosa has a granular appearance and contains maturing ribosomal particles. 30,000x
-- Pars fibrosa
Three regions of the nucleolus are visible in this electron micrograph. The pale areas are the nucleolar organizing centers. The most dense areas are the pars fibrosa, which contain newly synthesized primary transcripts of RNA genes. The pars granulosa has a granular appearance and contains maturing ribosomal particles. 30,000x
-- Pars granulosa
Three regions of the nucleolus are visible in this electron micrograph. The pale areas are the nucleolar organizing centers. The most dense areas are the pars fibrosa, which contain newly synthesized primary transcripts of RNA genes. The pars granulosa has a granular appearance and contains maturing ribosomal particles. 30,000x
- Nuclear envelope
Three regions of the nucleolus are visible in this electron micrograph. The pale areas are the nucleolar organizing centers. The most dense areas are the pars fibrosa, which contain newly synthesized primary transcripts of RNA genes. The pars granulosa has a granular appearance and contains maturing ribosomal particles. 30,000x
Polysomes
Three regions of the nucleolus are visible in this electron micrograph. The pale areas are the nucleolar organizing centers. The most dense areas are the pars fibrosa, which contain newly synthesized primary transcripts of RNA genes. The pars granulosa has a granular appearance and contains maturing ribosomal particles. 30,000x