Domain	Number of genes
UQ_con	202
Urb2	4
Urease_alpha	2
Urease_beta	2
Urease_gamma	2
UreD	2
UreF	2
uri-1	1
Uricase	2
urm-1	1
Urm1	9
Urocanase	6
Urocanase_C	3
Urocanase_N	4
URO-D	7
use-1	1
Use1	7
USF2	2
USF3	1
USH1G	1