Table 2.

Changes in expression levels of the nif operon of Paenibacillus sp. strains S02 and S25 when NH₄Cl was removed from the media.

nif genes	S02	S25
	Fold-change	Fold-change
nifB	22.50*	2.46*
nifH	20.21*	3.90*
nifD	15.80*	2.06*
nifK	17.51*	2.01*
nifE	15.86*	1.76*
nifN	18.16*	1.59
nifX	8.62*	1.19
hesA/moeB	15.13*	1.56
nifV	11.01*	− 1.46

*Genes that were differentially expressed (q-value < 0.05 and absolute fold-change ≥ 1.5) when nitrogen was removed from the media.