nucleoid

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nucleoid

 [noo´kle-oid]
1. resembling a nucleus.
2. a nucleus-like body sometimes seen in the center of an erythrocyte.
3. the central region of a bacterium, consisting of a dense irregularly shaped region containing DNA material without a surrounding nuclear membrane.
4. the genetic material (nucleic acid) of a virus, situated in the center of the virion.

nu·cle·oid

(nū'klē-oyd),
1. Synonym(s): nucleiform
2. A nuclear inclusion body.
3. Synonym(s): nucleus (2)
[nucleo- + G. eidos, resemblance]

nucleoid

/nu·cle·oid/ (noo´kle-oid)
1. resembling a nucleus.
2. a nucleus-like body sometimes seen in the center of an erythrocyte.
3. the genetic material (nucleic acid) of a virus situated in the center of the virion.
4. the nuclear region of a bacterium, which contains the chromosome but is not limited by a nuclear membrane.

nucleoid

(no͞o′klē-oid′, nyo͞o′-)
n.
The undefined region of genetic material inside a prokaryotic cell, consisting of aggregated DNA.

nucleoid

A condensed body within a bacterium that contains the prokaryote’s genome.

nu·cle·oid

(nū'klē-oyd)
1. Synonym(s): nucleiform.
2. A nuclear inclusion body.
3. Synonym(s): nucleus (2) .
[nucleo- + G. eidos, resemblance]

nucleoid

  1. the chromosomal region of a BACTERIUM. In ESCHERICHIA COLI it comprises mainly DNA with some PROTEINS (analagous to, but not HISTONES) and RNA. The structure is very compact and the DNA is folded into a series of loops, that are supercoiled (see SUPERCOILED DNA).
  2. the DNA mass in the CHLOROPLAST or MITOCHONDRION.
  3. the core of ribonucleic acid and protein in the virion of a RETROVIRUS.

nu·cle·oid

(nū'klē-oyd)
1. A nuclear inclusion body.
2. Synonym(s): nucleus (2) .
[nucleo- + G. eidos, resemblance]

nucleoid

1. resembling a nucleus.
2. a nucleus-like body sometimes seen in the center of an erythrocyte.
3. the genetic material (nucleic acid) of a rickettsia, chlamydia and some viruses, e.g. poxviruses, situated in the center of the microorganism.
References in periodicals archive ?
The students can be prompted to identify the twine as representing the bacterial chromosome (the double helical structure should be very helpful) and the marbles as representing components of the cytoplasm, such as enzymes or ribosomes.
The findings, published in the March 31 issue of Science, provide an atomic-resolution image of the DnaG primase protein, which performs the essential step of producing RNA primers that are required for initiating DNA replication of the bacterial chromosome.
Distance correlation analysis by comparing the CSRS values of 80 bacterial chromosomes, and 15 chloroplast genomes showed that this data-rich and unbiased method of whole genome approach would produce phylogenic tress similar to most commonly accepted phylogenic trees.
The map is so named because bacterial chromosomes are used to package the animal's DNA segments.
Since bacterial chromosomes usually come in circles, this theory invokes pictures of stacked loops of DNA, resembling a roll of hard candies, and so has earned the name the Life Saver hypothesis.
Blue Heron is one of the few companies that routinely provides fragments of 10 to 20 kilo bases in length; this project could allow us to produce the largest mammalian genes and even bacterial chromosomes as a standard part of our service.
Since ParA and ParB bind to specific DNA sequences on a chromosome, t heir movement hints that they may be part of the machinery that guides a pair of bacterial chromosomes to opposite ends of the cell before it splits in two.
The catP gene has been found on various bacterial chromosomes and conjugative plasmids as part of the transposable element Tn4451.