1. Wolk, C.P., Ernst, A. and Elhai, J. (1994) Heterocyst metabolism and development, in The Molecular Biology of Cyanobacteria (Bryant, D.A., ed.), pp. 769–823, Kluwer
2. Haselkorn, R. and Buikema, W.J. (1992) Nitrogen fixation in cyanobacteria, in Biological Nitrogen Fixation (Stacey, G., Burris, R.H. and Evans, H.J., eds), pp. 166–190, Chapman & Hall
3. Regulation of electron flow to nitrogenase in a cell-free system from heterocysts of Anabaena variabilis;Böhme;Biochim. Biophys. Acta,1987
4. Expression of ferredoxin-NADP+ reductase in heterocysts from Anabaena sp.;Razquin;Biochem. J.,1996
5. Genetic evidence of a major role for glucose-6-phosphate dehydrogenase in nitrogen fixation and dark growth of the cyanobacterium Nostoc sp. strain ATCC 29 133;Summers;J. Bacteriol.,1995