Q: Explain what is heterocyst and how does it work?
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A heterocyst is a differentiated cyanobacterial cell that carries out nitrogen fixation. ... The mature heterocysts contain no functional photosystem II and cannot produce oxygen. Instead, they contain only photosystem I, which enables them to carry out cyclic photophosphorylation and ATP regeneration.
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Protein which is implicated in heterocyst formation. A heterocyst is a differentiated cyanobacterial cell that carries out nitrogen fixation. The heterocysts function as the sites for nitrogen fixation under aerobic conditions. They are formed in response to a lack of fixed nitrogen (NH4 or NO3).
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