Loss of p16 mimics overproduction of cyclin Ds

TLS Online TPP Program

#Id: 6417

#Unit 2. Cellular Organization

The trp operon is controlled by repression and attenuation, providing a two-stage response to progressively more stringent tryptophan starvation. But attenuation alone can provide robust regulation: other amino acid operons such as leu and his rely entirely on attenuation for their control. In the case of the leucine operon, its leader peptide has four adjacent leucine codons, and the histidine operon leader peptide has seven histidine codons in a row.

TLS Online TPP Program

#Id: 764

#Unit 3. Fundamental Processes

Transition from CPC to OPC often called isomerization, does not require energy derived from ATP hydrolysis and is instead the result of a spontaneous conformational change in the DNA– enzyme complex to a more energetically favorable form.

TLS Online TPP Program

#Id: 711

#Unit 3. Fundamental Processes

DnaA has a weak intrinsic activity that converts the ATP to ADP, this is enhanced by a factor termed Hda.

TLS Online TPP Program

#Id: 1487

#Unit 4. Cell Communication and Cell Signaling

The tumor suppressor proteins p53 and Rb act as guardians of the cell cycle.

TLS Online TPP Program

#Id: 8553

#Unit 1. Molecules and their Interaction Relevant to Biology