They appear to have a mixture of prokaryotic and eukaryotic genes. 它們被認為是某些真核生物基因和原核生物基因的混合體。
According the traditional concepts, the eukaryotic chromosomes are linear and the prokaryotic chromosomes are circular. 傳統的生物學觀念認為真核生物的染色體是線狀的,原核生物的染色體則是環狀的。