BioScience Dictionary

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Found Transcription 58 times.

Displaying results 1 to 10.

1. Actinomycin D
A relatively toxic antibiotic produced by the fungus like bacterium Streptomyces parvallum. It inhibits RNA transcription in eukaryotes and has antitumor properties, so it is often used in conjunction with other drugs in chemotherapy .

2. Activator
In biochemistry: * A DNA -binding protein that regulates one or more gene s by increasing the rate of transcription . * A metabolite that positively modulates an allosteric enzyme .

3. Antisense RNA (anti-sense RNA)
A complementary RNA sequence that binds to (and thus blocks the transcription of) a naturally-occuring (sense) messenger RNA molecule.

4. Antisense strand (anticoding strand)
The strand of DNA which is not used during transcription to make mRNA . The mRNA made during transcription thus has the same sequence as this strand (so that the eventual protein will be a sense version). See also sense strand .

5. Antitermination factor
A gene regulatory protein that blocks signals for the transcription process to stop as a form of regulatory control over whatever the gene being transcribed is coding for.

6. Attenuator
An RNA sequence that regulates the expression of certain gene s by terminating transcription .

7. Bacteriophage T7
A bacteriophage (a virus which infects bacteria ) that is useful to geneticist s because it has a very strong promoter region which strongly encourages transcription of its gene by specific T7 RNA polymerase . Geneticists can take the part with the promoter and attach their own genes of interest to it so that they can control transcription rates of their gene by choosing the amount of the RNA polymerase to put in.

8. Balbiani rings (chromosome puffs)
Giant puffs on a polytene chromosome in the salivary glands of certain insect larvae which, when present, means that transcription of DNA is taking place. The puffs are areas where the chromosome has become decondensed for the purpose, and are easily visible with a light microscope.

9. CAAT box (cat box)
A particular sequence of nucleotide base s (GG T/C AATCT) found in the promoter s of many eukaryotic gene s, which is necessary for transcription to proceed smoothly.

10. CAMP (Cyclic adenosine monophosphate)
A molecule responsible for many cellular reactions, including controlling the rate of transcription of DNA .