Table 4.

Comparative data on codon usage and G+C content in the studied region of the kai gene family and some other genes of N. linckia and other cyanobacteria

Gene (accession number)	Promoter/ intergenic spacer*	Coding region
	G+C	CBI	G+C2	G+C3s	G+C
kai
Nodularia PCC 73104	0.286	0.425	0.368	0.336	0.419
Cylindrospermum PCC 7417	0.289	0.398	0.375	0.353	0.423
N. punctiforme	0.246	0.538	0.370	0.273	0.400
kaiI, N. linckia	0.350	0.452	0.373	0.323	0.413
kaiII, N. linckia	0.405	0.482	0.378	0.334	0.414
kaiIII, N. linckia	0.314	0.490	0.375	0.332	0.412
kaiIV, N. linckia	0.226	0.470	0.366	0.342	0.415
kaiV, N. linckia	0.321	0.458	0.374	0.320	0.411
Average in kai of N. linckia	0.368	0.473	0.374	0.330	0.413
Acetyl-CoA synthase, N. linckia (AY037787)	—	0.712	0.463	0.918	0.661
dnaK, N. linckia (AF388880)	0.374	0.409	0.439	0.421	0.490
sodF, N. linckia (AY055243)	0.320	0.252	0.370	0.464	0.455
Ribosomal protein L12, Synechocystis (X53178)†	0.368	0.693	0.398	0.408	0.484
trpA, N. punctiforme (AF288131)	0.478	0.405	0.439	0.409	0.487

G + C2 − GC content at the second codon positions; G + C3s − GC content at third (synonymous) codon positions; G + C − GC content in the genomic region. 

^*In kai gene. 

^† Ref. 64.