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

TLS Online TPP Program

#Id: 6145

#Unit 3. Fundamental Processes

Cockayne syndrome can be caused by mutations in either of two genes (CSA and CSB), both of whose products appear to be part of or bound to TFIIH, and can also be caused by specific mutations in XPB or XPD.

TLS Online TPP Program

#Id: 1271

#Unit 7. System Physiology – Animal

The zona glomerulosa is controlled via; Renin-angiotensin-aldosterone system. 

TLS Online TPP Program

#Id: 6755

#Unit 3. Fundamental Processes

Most mRNAs decay stochastically (like the decay of radioactive isotopes), and as a result mRNA stability is usually expressed as a half- life (t½).

TLS Online TPP Program

#Id: 5044

#Unit 3. Fundamental Processes

Only fully methylated origins can initiate replication;

hemimethylated daughter origins cannot be used again until they have been restored to the fully methylated state.

TLS Online TPP Program

#Id: 10540

#Unit 4. Cell Communication and Cell Signaling

PKB phosphorylates Bad, and phosphorylated Bad forms a complex with a cytosolic 14-3-3 protein.