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'heterocyst' can also refer to...








Ammonium (methylammonium) transport by heterocysts and vegetative cells of Anabaena variabilis

Regulation of heterocyst frequency in Baltic Sea Aphanizomenon sp.

The multicellular nature of filamentous heterocyst-forming cyanobacteria

Intercellular transfer along the trichomes of the invasive terminal heterocyst forming cyanobacterium Cylindrospermopsis raciborskii CS-505

Differential transcriptional regulation of orthologous dps genes from two closely related heterocyst-forming cyanobacteria

Genes of Cyanobacterial Origin in Plant Nuclear Genomes Point to a Heterocyst-Forming Plastid Ancestor

Spatio-Temporal Gene Induction Systems in the Heterocyst-Forming Multicellular Cyanobacterium Anabaena sp. PCC 7120

Description of five mutants of the cyanobacterium Anabaena sp. strain PCC 7120 affected in heterocyst differentiation and identification of the transposon-tagged genes

NaCl enhances cellular cAMP and upregulates genes related to heterocyst development in the cyanobacterium, Anabaena sp. strain PCC 7120

A HupS–GFP fusion protein demonstrates a heterocyst-specific localization of the uptake hydrogenase in Nostoc punctiforme

Characterization of HetN, a protein involved in heterocyst differentiation in the cyanobacterium Anabaena sp. strain PCC 7120

Identification of the glycosyl transferase required for synthesis of the principal glycolipid characteristic of heterocysts of Anabaena sp. strain PCC 7120


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A specialized cell found in nitrogen-fixing cyanobacteria. Heterocysts are enlarged cells with thick cell walls and they lack chlorophyll, giving them a colourless appearance. They are the site of nitrogen fixation, for which they produce the enzyme nitrogenase. The lack of photosynthetic activity (which would produce oxygen), together with the thick cell wall, are thought to maintain the anoxic conditions in heterocysts that are essential for the activity of nitrogenase. Heterocysts are connected by plasmodesmata to surrounding cells, on which they depend for nutrients.

Subjects: Biological Sciences — Chemistry.

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