What's the difference between mRNA and pre-mRNA ... Furthermore, new exons can be inserted into old introns, creating new proteins without disrupting the function of the old gene.

Exons can be separated by intervening sections of DNA that do not code for proteins, known as introns. Following transcription, new, immature strands of messenger RNA, called pre-mRNA, may contain ...

A complex molecular machine, the spliceosome, ensures that the genetic information from the genome, after being transcribed ...

the sequence motifs required are located close by on the pre-mRNA,” said Cooper. “Often, they will be clustered and usually be within the first 100 or 200 nucleotides within the introns. They can also ...

San Francisco): "Nuclear pre-mRNA splicing is the process by which the introns- -the noncoding portions of precursor mRNAs--are removed and the coding sequences called exons are ligated together. This ...

A sophisticated molecular machine, the spliceosome, ensures the accurate assembly of genetic information from the genome into ...

Each tRNA molecule has an anticodon that is complementary to a specific codon on the mRNA. The tRNA binds to its corresponding ... Other ribozymes include self-splicing introns and the RNA component ...