The major candidate for the factor that forms the Nieuwkoop center was β-catenin (This multifunctional protein also proved to be a key player in the formation of the dorsal amphibian tissues)

TLS Online TPP Program

#Id: 8568

#Unit 1. Molecules and their Interaction Relevant to Biology

In the presence of a non-competitive inhibitor which will bind equally well to E or to ES- Vmax decreases but not Km 

TLS Online TPP Program

#Id: 6861

#Unit 3. Fundamental Processes

In Drosophila, an example of position effect variegation in the fly eye. 

TLS Online TPP Program

#Id: 5992

#Unit 3. Fundamental Processes

Eukaryotic replicons are 40 to 100 kb in length and individual replicons are activated at characteristic times during S phase.

TLS Online TPP Program

#Id: 5484

#Unit 7. System Physiology – Animal

Approximately 50% of the choline is returned to the presynaptic terminal by Na+-choline cotransport

TLS Online TPP Program

#Id: 9655

#Unit 4. Cell Communication and Cell Signaling

Feedback regulation by MAP Kinase

Phosphorylation of threonine residue in HER1 decreases the ability of the receptor kinase to become fully active.