Domain	Number of genes
xbx-3	1
xbx-4	1
xbx-5	1
xbx-6	1
xbx-9	1
XdhC_C	1
XendoU	15
XG_FTase	1
XK-related	29
XLF	4
Xlink	7
xnd-1	1
xnp-1	1
xol-1	1
xpa-1	1
XPA_C	9
XPA_N	5
xpc-1	1
XPC-binding	6
xpg-1	1