Phosphorylation on multiple sites by G1 CDKs blocks Rb from associating with E2F and promotes its export out of the nucleus.

TLS Online TPP Program

#Id: 8394

#Section 3: Genetics, Cellular and Molecular Biology

When the Ca2+ levels drop:

Myosin LC is dephosphorylated by MLC phosphatase, causing muscle relaxation.

TLS Online TPP Program

#Id: 7937

#Section 3: Genetics, Cellular and Molecular Biology

Once the ER signal sequence emerges from the ribosome, it is bound by a signal recognition particle (SRP)

TLS Online TPP Program

#Id: 8169

#Section 3: Genetics, Cellular and Molecular Biology

Rab·GTP is enabled to bind to a variety of different proteins, known as Rab effectors.

TLS Online TPP Program

#Id: 10321

#Section 2: General Biology

The tumor down regulates the expression of class I MHC proteins

TLS Online TPP Program

#Id: 10360

#Section 2: General Biology

Plasma cell decision point