Table 4.

Number of clusters by pairs of SGs. Non-singleton and singleton clusters are counted separately.

Pair of SGs	Number of non-singleton clusters	Number of singleton clusters
OBJC–ORGA	11	23
CONC–OBJC	9	28
CONC–PROC	11	30
CONC–PHYS	2	78
ACTI–DISO	4	2
CHEM–OBJC	3	11
CONC–DEVI	2	16
ACTI–CONC	3	9
PHYS–PROC	6	9
ANAT–CHEM	4	8
ACTI–PHYS	3	6
PHEN–PHYS	4	3
CHEM–GENE	2	6
ANAT–OBJC	1	2
CHEM–LIVB	2	6