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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.  33,000x

Nucleolus <p>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.  33,000x</p>

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.  33,000x
- Nucleolar organizing centers <p>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.  33,000x</p>

- 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.  33,000x
- Pars fibrosa <p>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.  33,000x</p>

- 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.  33,000x
- Pars granulosa <p>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.  33,000x</p>

- 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.  33,000x
RER <p>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.  33,000x</p>

RER

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.  33,000x
Main SlideNucleolus - Nucleolar organizing centers - Pars fibrosa - Pars granulosaRER