Table 1.

Detected Type II R-M targets across the dataset of 8552 genomes

Length (k)	REBASE motifs	k-mer targets	Palindromes	Genomes*	Species
4	11	11	10 of 12	691	33
5	30	59	-	1266	61
6	58	179	45 of 64	1446	55
7	4	28	-	61	3
9	1	64	-	5	4

* Number of genomes with at least one R-M system targeting a target of length k.