Domain	Number of genes
21ur-1965	1
21ur-1966	1
21ur-1967	1
21ur-1968	1
21ur-1969	1
21ur-197	1
21ur-1970	1
21ur-1971	1
21ur-1972	1
21ur-1973	1
21ur-1974	1
21ur-1975	1
21ur-1976	1
21ur-1977	1
21ur-1978	1
21ur-1979	1
21ur-198	1
21ur-1980	1
21ur-1981	1
21ur-1982	1