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J Bacteriol. 2001 Jan;183(1):393-6.

Role for hetC in the transition to a nondividing state during heterocyst differentiation in Anabaena sp.

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  • 1MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824-1312, USA.


Nitrogen-deprived filaments of wild-type or hetC Anabaena sp. produce respectively, at semiregular intervals, heterocysts and weakly fluorescent cells. Unlike heterocysts, the latter cells can divide and elongate, producing a pattern of spaced series of small cells. Because a hetR::gfp fusion is expressed most strongly in the small cells, we propose that these small cells represent a very early stage of heterocyst differentiation. hetC::gfp is expressed most strongly in proheterocysts and heterocysts.

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