The Helix Loop Helix Proteins Element Binding Proteins Can Jbc Form

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the helix-turn-helix transcription factors possessed to alpha helixes separated by a short turn and the second alpha helix rests in the major grooves of the DNA double helix upon binding while the h th binding region is only 20 amino acids long other parts of the protein control which segment of DNA the protein will bind to these proteins include bacterial proteins such as the commonly described lactose repressor of the lac operon and the tryptophan repressor of the trip operon often discussed in general biology textbooks these transcription factors are known in bacteria archaea and eukaryotes and they are the most widespread transcription factors in prokaryotic cells h th factors are present as Sigma factors the R PB 10 subunit of RNA polymerase and a new carry otic protein such as mabh and bracket 2 this domain of the H th has proved to be very versatile since it's been incorporated into proteins involved in DNA replication and transpose aces into grace's RNA binding and even enzymes