Table 5.

Distribution of rare 6-mers in cyanobacterial genomes

Ratio (a) Obs/Shuf	Number of 6-mers
	Mic-PCC7806	Mic-NIES843	Cwa-WH8501	Syn-PCC6803
< 0.02	6 (4)	12 (8)	6 (3)	0 (0)
< 0.04	13 (8)	11 (5)	9 (3)	7 (3)
< 0.06	10 (4)	8 (3)	6 (3)	5 (2)
< 0.08	2 (1)	2 (1)	3 (2)	6 (1)
< 0.1	2 (1)	3 (0)	13 (6)	14 (1)

(a) Ratio between the frequency observed (Obs) for a given 6-mers and the frequency for the same 6-mers after shuffling (Shuf) of the genome sequence.

Figures in bold represent the number of 6-mers present 50× more in the shuffled sequence than in the original sequence. Figures in parentheses indicate the number of palindromic sites.

See the Methods section for the strain identifiers.