Operons in eukaryotes
نویسندگان
چکیده
منابع مشابه
Operons in eukaryotes.
It was thought that polycistronic transcription is a characteristic of bacteria and archaea, where many of the genes are clustered in operons composed of two to more than ten genes. By contrast, the genes of eukaryotes are generally considered to be monocistronic, each with its own promoter at the 5' end and a transcription terminator at the 3' end; however, it has recently become clear that no...
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About 70% of C. elegans mRNAs are trans-spliced to one of two 22 nucleotide spliced leaders. SL1 is used to trim off the 5' ends of pre-mRNAs and replace them with the SL1 sequence. This processing event is very closely related to cis-splicing, or intron removal. The SL1 sequence is donated by a 100 nt small nuclear ribonucleoprotein particle (snRNP). This snRNP is structurally and functionally...
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The objective of this chapter is to provide an overview of eukaryotic phospholipid biosynthesis at an advanced level. Phospholipids make up the essential milieu of cellular membranes and act as a barrier for entry of compounds into cells. Phospholipids also function as precursors of second messengers such as diacylglycerol (DG) and inositol1,4,5-P3 which is covered in Chapter 12. A third, and u...
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was coined in 1920 (see Chapter 1), the general concept goes back at least as far as the 4th century BCE, when Aristotle implicated blood as the heredity substance. The blood of the mother, it was thought, supplied matter to the developing fetus whereas the semen (a purified form of blood) of the father conveyed form (Aristotle, 1953). Ironically, although the notions of “blood relations” and c...
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ژورنال
عنوان ژورنال: Briefings in Functional Genomics and Proteomics
سال: 2004
ISSN: 1473-9550,1477-4062
DOI: 10.1093/bfgp/3.3.199