All four core histones show a similar type of structure in which three a-helices are connected by two loops. This highly conserved structure is called the histone fold.

TLS Online TPP Program

#Id: 2335

#Unit 3. Fundamental Processes

A ribosome-associated protein called RelA receives the “alarm” and produces the “alarmone” ppGpp, which destabilizes open promoter complexes whose lifetimes are normally short, thus inhibiting Transcription.

TLS Online TPP Program

#Id: 861

#Unit 13. Methods in Biology

The time taken for each cycle is considerably longer than 3 min (0.5 + 1.5 +1 min)

TLS Online TPP Program

#Id: 3204

#Unit 3. Fundamental Processes

Recombination-repair systems use recombination to replace the double-stranded region that has been damaged.

TLS Online TPP Program

#Id: 4505

#Unit 13. Methods in Biology

Electroencephalography (EEG)

A method to record an electrogram of the spontaneous electrical activity of the brain.

TLS Online TPP Program

#Id: 3030

#Unit 3. Fundamental Processes

The use of a single type of catalytic subunit, however, may be atypical. In the bacterium Bacillus subtilis, there are two different catalytic subunits.

PolC is the homolog to E. coli's DnaE, and is responsible for synthesizing the leading strand.

A related protein, DnaE8 s. is the catalytic subunit that synthesizes the lagging strand.