Quite distinct from the classic Café de Paris sauce are various compound butters commonly referred to as Café de Paris butter. These typically contain a mixture of herbs, spices, and other condiments such as mustard , marjoram , dill , rosemary , tarragon , paprika , capers , chives , curry powder , parsley , shallot , garlic , Worcestershire sauce , and anchovies , all whipped into the butter. The resulting compound butter is shaped into a roll using aluminium foil and chilled. When the dish is served, a piece of the butter is sliced off and allowed to melt on the hot meat.
When transcription of bacterial rRNAs and tRNAs is completed they are immediately ready for use in translation. No additional processing takes place. Translation of bacterial mRNAs can begin even before transcription is completed due to the lack of the nuclear-cytoplasmic separation that exists in eukaryotes. The ability to initiate translation of prokaryotic RNAs while transcription is still in progress affords a unique opportunity for regulating the transcription of certain genes. An additional feature of bacterial mRNAs is that most are polycistronic. This means that multiple polypeptides can be synthesized from a single primary transcript. Polycistronic mRNAs are very rare in eukaryotic cells but have been identified. The mitochondrial genomes in mammals and the slime mold, Dictyostelium discoideum , encode polycistronic mRNAs that are processed into primarily mono-, di-, and tricistronic transcripts. In addition, several viruses encode polycistronic RNAs.