PET category	Number	Percentage	Percentage of total PETs	Order
Total PETs	120,768,728	NA	NA	(1)
Valid PETs after linker filtering	66,121,769	54.75% of (1)	54.75% of (1)	(2)
Uniquely Mapped same-linker PETs	55,260,204	83.57% of (2)	45.76% of (1)	(3)
Merging same same-linker PETs	34,908,814	63.17% of (3)	28.91% of (1)	(4)
Merging similar same-linker PETs	34,243,001	98.09% of (4)	28.35% of (1)	(5)
Self-ligation PETs	10,183,703	29.74% of (5)	8.43% of (1)	(6)
Inter-ligation PETs	17,526,431	51.18% of (5)	14.51% of (1)	(7)
Other PETs with short distance	6,532,867	19.08% of (5)	5.41% of (1)	(8)
Peaks from self-ligation	5,535	NA	NA	(9)
Interacting pairs	341,660	NA	NA	(10)