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A transcription bubble is a molecular structure formed during DNA transcription when a limited portion of the DNA double helix is unwound. The size of a transcription bubble ranges from 12 to 14 base pairs. A transcription bubble is formed when the RNA polymerase enzyme binds to a promoter and causes two DNA strands to detach. [1]
RNA polymerase, assisted by one or more general transcription factors, then unwinds approximately 14 base pairs of DNA to form an RNA polymerase-promoter open complex. In the open complex, the promoter DNA is partly unwound and single-stranded. The exposed, single-stranded DNA is referred to as the "transcription bubble". [6]
All members of the TEAD family share a highly conserved DNA binding domain called the TEA domain. [10] This DNA binding domain has a consensus DNA sequence 5’-CATTCCA/T-3’ that is called the MCAT element. [11] The three dimensional structure of the TEA domain has been identified. [9] Its conformation is close to that of the homeodomain and ...
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Bacterial transcription is the process in which a segment of bacterial DNA is copied into a newly synthesized strand of messenger RNA (mRNA) with use of the enzyme RNA polymerase. The process occurs in three main steps: initiation, elongation, and termination; and the result is a strand of mRNA that is complementary to a single strand of DNA.
Eukaryotic Transcription. Eukaryotic transcription is the elaborate process that eukaryotic cells use to copy genetic information stored in DNA into units of transportable complementary RNA replica. [1] Gene transcription occurs in both eukaryotic and prokaryotic cells. Unlike prokaryotic RNA polymerase that initiates the transcription of all ...
A sweet Taiwanese drink nicknamed in honor of a Hong Kong celebrity, bubble tea – also known as boba tea – has become an unstoppable worldwide trend since it was invented in the 1980s.
When bubble tea was first introduced to the West, you could get it only in cheery mom-and-pop shops in big-city Chinatowns and Koreatowns. And while Asians and Asian Americans have been drinking ...