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In low nitrogen environments, heterocyst differentiation is triggered by the transcriptional regulator NtcA. NtcA influences heterocyst differentiation by signaling proteins involved in the process of heterocyst differentiation. For instance, NtcA controls the expression of several genes including HetR which is crucial for heterocyst ...
Nostoc, also known as star jelly, troll's butter, spit of moon, fallen star, witch's butter (not to be confused with the fungi commonly known as witches' butter), and witch's jelly, is the most common genus of cyanobacteria found in a variety of both aquatic and terrestrial environments that may form colonies composed of filaments of moniliform cells in a gelatinous sheath of polysaccharides. [1]
The constants listed here are known values of physical constants expressed in SI units; that is, physical quantities that are generally believed to be universal in nature and thus are independent of the unit system in which they are measured.
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Pages for logged out editors learn more. Contributions; Talk; Heterocysts
[25] [26] In cyanobacteria, this enzyme system is housed in a specialized cell called the heterocyst. [27] The production of the nitrogenase complex is genetically regulated, and the activity of the protein complex is dependent on ambient oxygen concentrations, and intra- and extracellular concentrations of ammonia and oxidized nitrogen species ...
The heterocyst is characterized by a thick glycolipid layer which minimizes oxygen's ability to interfere with nitrogen fixation. [2] This is important to Richelia’s function as oxygen can bind to nitrogenase and inhibit the cyanobacteria's nitrogen fixing abilities. [2] The heterocyst does not divide, while the vegetative cells do. [2]
Intercalary located akinete of Dolichospermum smithii Terminally located akinete of Gloeotrichia Akinetes, also termed "cysts", of Haematococcus. An akinete is an enveloped, thick-walled, non-motile, dormant cell formed by both cyanobacteria and algae.