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

真核生物而不，转运RNA中含有内含，还有不具备的多顺反的（基因的调控）。

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

乳糖元是可诱导的元；色氨酸元是可阻遏的元。