例文
- Bidirectional transcription from a long intergenic region ( LIR ) results in the virion-sense expression of a movement protein ( MP ) and a coat protein ( CP ), and the complementary-sense expression of the replication-associated proteins, Rep and RepA . Whereas the MP and CP are involved in virus movement and encapsidation, Rep is an essential initiator of virus replication, and RepA is a regulator of host and viral gene transcription.