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
(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
- 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).
- the DNA mass in the CHLOROPLAST or MITOCHONDRION.
- 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]