Feedback mechanisms suppress signaling by the PKA pathway:

1. Intrinsic GTPase activity of Gαs

2. PDE acts to hydrolyze cAMP to 5′-AMP

3. By BARK

TLS Online TPP Program

#Id: 5940

#Unit 10. Ecological Principles

Linkage density It is the number of actual link links per species

TLS Online TPP Program

#Id: 9241

#Unit 6. System Physiology – Plant

PEP carboxykinase (PEPCK) C4 photosynthesis is more complex than the other two types

TLS Online TPP Program

#Id: 1541

#Unit 2. Cellular Organization

Kinesin-13 (End-Binding Proteins)

• Bind and curve the end of the tubulin protofilaments into the GDP-β-tubulin conformation

• Facilitate the removal of terminal tubulin dimers 

• Greatly enhancing the frequency of catastrophes

TLS Online TPP Program

#Id: 689

#Unit 3. Fundamental Processes

TLS Online TPP Program

#Id: 1486

#Unit 4. Cell Communication and Cell Signaling

When DNA is damaged, p53 is tetramerized and accumulates rapidly.