Cohesin-mediated cohesion between sister chromatids is established by a two-step process:

1.Loading and unloading of cohesins

2. Stabilization of cohesins

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: 8868

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 8108

#Section 2: General Biology

A typical membrane lipid of archaea.

Diphytanyl moieties are 8 five-carbon isoprene groups condensed end-to-end.

TLS Online TPP Program

#Id: 8602

#Section 3: Genetics, Cellular and Molecular Biology

cyclin-CDK complexes preferentially phosphorylate

serine and threonine residues when they are found within the consensus sequence:

[S/T]PX[R/K]K 

TLS Online TPP Program

#Id: 8849

#Section 3: Genetics, Cellular and Molecular Biology

Phosphorylation of MCM helicase activators by G1/S phase CDKs and S phase CDKs, prevents reloading of MCM helicases (ensuring that replication from each origin occurs only once during each cell cycle)