PET category	Number	Percentage	Percentage of total PETs	Order
Total PETs	125,331,457	NA	NA	(1)
Valid PETs after linker filtering	76,633,681	61.14% of (1)	61.14% of (1)	(2)
Uniquely Mapped same-linker PETs	70,023,723	91.37% of (2)	55.87% of (1)	(3)
Merging same same-linker PETs	32,199,706	45.98% of (3)	25.69% of (1)	(4)
Merging similar same-linker PETs	31,231,907	96.99% of (4)	24.92% of (1)	(5)
Self-ligation PETs	8,658,382	27.72% of (5)	6.91% of (1)	(6)
Inter-ligation PETs	16,602,049	53.16% of (5)	13.25% of (1)	(7)
Other PETs with short distance	5,971,476	19.12% of (5)	4.76% of (1)	(8)
Peaks from self-ligation	5,434	NA	NA	(9)
Interacting pairs	610,296	NA	NA	(10)