That such coupling is not an incidental consequence of the absence of a spatial barrier is underscored by the phenomenon of nonsense polarity in bacteria, first identified in the lac and trp operons of Escherichia coli nearly 40 years ago (;).everal co-transcriptional activities involving RNA as the substrate serve to prevent the occurrence of R-loops, and the coupling of transcription to translation in the bacteria may be seen as a special instance of such a co-transcriptional activity.
An import is a good brought into a jurisdiction, especially across a national border, from an external source. The party bringing in the good is called an importer.[1][2] An import in the receiving country is an export from the sending country.
Imports and exports. AâtoâZ. 1  Business support on the phone and online. 2  Classify imports and exports using the UK Trade Tariff. 3  Duty relief for imports and exports. 4  Excise Movement and Control System (EMCS). 5  Export agents for international trade. 6  Finding commodity codes for import and export duty.âtoâZ. 1  Business support on the phone and online. 2  Classify imports and exports using the UK Trade Tariff. 3  Duty relief for imports and exports. 4  Excise Movement and Control System (EMCS).