Nukleoid
Nukleoid (lat. nucleus = oraščić; grč. εἶδος = oblik, vrsta) je nepravilno oblikovano područje unutar prokariotske stanice u kojem se nalazi genetski materijal i koje nije obavijeno jezgrinom ovojnicom. Genom prokariotskih organizama uglavnom je kružna, odnosno prstenasta molekula DNA.
U središnjem dijelu citoplazme, nukleoidu, nalazi se genska uputa u obliku prstenaste DNA. Po ulozi, nukleoid ulogom odgovara jezgri.[1]
Duljina genoma obično široko varira, no najčešće se sastoji od barem nekoliko milijuna baznih parova. Zaliha genoma u nukleoidu usporediva je s onom u eukariotskoj stanici gdje je genom kondenziran u kromatin i zatvoren unutar jezgre. U nukleoidu se nalazi genofor, prokariotski ekvivalent kromosoma.
Vidi
Izvori
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