nitrogenase messenger rna synthesis in klebsiella pneumoniae was determined by labelling cells with ( 3h ) uracil and isolating total rna , which was then hybridized to filter-bound recombinant plasmid psa30 dna carrying the nitrogenase structural genes nifh , d , and k , derepression of nitrogenase mrna starts 1.5 h before the onset of nitrogenase activity ( as measured by acetylene reduction ) .
C0035696
messenger rna
C0035668
rna