Inactive X chromosome also becomes associated with PRC2 complexes, which catalyze the trimethylation of histone H3 lysine 27. This methylation results in association of the PRC1 complex and transcriptional repression

TLS Online TPP Program

#Id: 8609

#Unit 2. Cellular Organization

In free CDK2, the A-loop blocks access of protein substrates to the γ phosphate of the bound ATP.

TLS Online TPP Program

#Id: 2981

#Unit 3. Fundamental Processes

DNA is synthesized in both semiconservative replication and repair reactions.

TLS Online TPP Program

#Id: 9331

#Unit 4. Cell Communication and Cell Signaling

In the dark, most transducin is localized to the outer segment, while most arrestin is found in other parts of the cell; in this condition, vision is most sensitive to very low light levels.

TLS Online TPP Program

#Id: 2964

#Unit 3. Fundamental Processes

The major role of ORC is to identify the origin to the Cdc6 and MCM proteins that control initiation and licensing.

TLS Online TPP Program

#Id: 1996

#Unit 3. Fundamental Processes

AAUAAA motif- CPSF CPSF 73 (CF1 & CFII)- Poly A site GU element- CstF