Domain	Number of genes
21ur-1947	1
21ur-1948	1
21ur-1949	1
21ur-195	1
21ur-1950	1
21ur-1951	1
21ur-1952	1
21ur-1953	1
21ur-1954	1
21ur-1955	1
21ur-1956	1
21ur-1957	1
21ur-1958	1
21ur-1959	1
21ur-196	1
21ur-1960	1
21ur-1961	1
21ur-1962	1
21ur-1963	1
21ur-1964	1