nucleoid

Examples of nucleoid in the following topics:

• Bacterial Chromosomes in the Nucleoid

  • The nucleoid is an irregularly-shaped region within the cell of a prokaryote that contains all or most of the genetic material.
  • The nucleoid can also be seen under a light microscope.by staining it with the Feulgen stain, which specifically stains DNA.
  • The DNA-intercalating stains DAPI and ethidium bromide are widely used for fluorescence microscopy of nucleoids.
  • Proteins helping to maintain the supercoiled structure of the nucleic acid are known as nucleoid proteins or nucleoid-associated proteins, and are distinct from histones of eukaryotic nuclei.
  • Prokaryote cell (right) showing the nucleoid in comparison to a eukaryotic cell (left) showing the nucleus.

• Complex and Asymmetrical Virus Particles

  • The viral genome is associated with proteins within a central disk structure known as a nucleoid.
  • The nucleoid is surrounded by a membrane and two lateral bodies of unknown function.

• Chemical Analysis of Microbial Cytoplasm

  • Macromolecules found within bacterial cytoplasm include the nucleoid region, ribosomes, proteins, and enzymes.
  • The nucleoid region is the area within the cell that houses the genetic material.

• The Cell Wall of Bacteria

  • The term "nucleoid" refers to the region of the cytoplasm where chromosomal DNA is located, usually a singular, circular chromosome.

• Verrucomicrobia

  • Like the Planctomycetes species, Verrucomicrobia possess a compartmentalised cell plan with a condensed nucleoid and the ribosomes pirellulosome (enclosed by the intracytoplasmic membrane) and paryphoplasm compartment between the intracytoplasmic membrane and cytoplasmic membrane.

• Planctomycetes

  • In addition to this nucleoid, there are two other membrane-separated compartments; the pirellulosome or riboplasm, which contains the ribosome and related proteins, and the ribosome-free paryphoplasm.

• Growth Rate and Temperature

  • These so-called cold shock proteins are thought to help the cell survive in temperatures lower than optimum growth temperature, by contrast with heat shock proteins, which help the cell survive in temperatures greater than the optimum, possibly by condensation of the chromosome and organization of the prokaryotic nucleoid.