Complementation analysis and characterization of the nitrogen fixation genes, nifH, nifC and nifJ in Klebsiella pneumoniae.

Complementation tests were performed with various nif mutations for delineating the nif genes. The nif-/nif- heterogenotes were constructed by transferring nif plasmid mutant PRD-nif- from E. coli Jc5466 to various Klebsiella pneumoniae nif- recipients.