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Physical and genetic map of the (a) NifL- and the (b) NifA-coding regions from A. vinelandii. NifL is divided into a sensory domain and a kinase-like domain. NifA is divided into a regulatory domain, a catalytic domain, and a DNA-binding domain. The hatched regions in NifL and NifA correspond to regions used to construct fusion proteins with GAL4 domains. Numbers correspond to amino acid residue numbering. N and C represent the amino and carboxyl termini, respectively.
