Domain	Number of genes
uso-1	1
Uso1_p115_C	3
Uso1_p115_head	6
Usp	41
usp-14	1
usp-3	1
usp-33	1
usp-39	1
usp-46	1
usp-48	1
usp-5	1
USP7_C2	8
USP7_ICP0_bdg	6
USP8_dimer	10
USP8_interact	4
UTF1	5
Utp11	6
Utp12	28
Utp13	7
Utp14	8