Table 3.

The CRP regulons are not conserved between PCC6803, PCC7120 and E. coli K12.

	E. coli K12	PCC6803	PCC7120
No. of genes	4133	5366	3172
No. of TUs	2070	1622	3300
No. of CRP-regulated genes	410	382 (p < 0.05),149 (p < 0.01)	969 (p < 0.05),442 (p < 0.01)
No. of CRP-regulated TUs	270	181 (p < 0.05),59 (p < 0.01)	537 (p < 0.05),249 (p < 0.01)
No. of CRP-regulated genes shared with E. coli K12	--	7 (p < 0.05), 2 (p < 0.01)	17 (p < 0.05),6 (p < 0.01)