Like eukaryotes, but unlike bacteria, they have introns in their transfer RNA, but like bacteria they have polycistronic operons (gene regulators).

像真核生物而不像，RNA中含有内含，还有不具备多顺反纵（基因调控）。

The lac operon is an inducible operon, whereas the trp operon is a repressible operon.

乳糖纵元是可诱导纵元；色氨酸纵元是可阻遏纵元。