X Huang, Y Dong, J Zhao, R Haselkorn - … Academy of Sciences of the United …, 2004 - JSTOR
HetR plays a key role in regulation of heterocyst differentiation. When the Cys-48 residue of
the HetR from Anabaena sp. PCC 7120 was replaced with an Ala residue, the mutant HetR …