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TLS Online TPP Program

#Id: 3533

A functional gene can be located through the use of an expressed sequence tag (EST)


#Unit 2. Cellular Organization #Gene & Genome #Part B Pointers
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TLS Online TPP Program

#Id: 1416

#Unit 4. Cell Communication and Cell Signaling

Phosphorylation of MLC  unfolds the myosin II, active and can assemble into bipolar filaments for contraction. 
TLS Online TPP Program

#Id: 1417

#Unit 4. Cell Communication and Cell Signaling

When the Ca2+ levels drop: Myosin LC is dephosphorylated by MLC phosphatase, causing muscle relaxation.
TLS Online TPP Program

#Id: 1418

#Unit 4. Cell Communication and Cell Signaling

Integrins are the principal receptors used by animal cells to bind to the extracellular matrix. 

 
TLS Online TPP Program

#Id: 1419

#Unit 4. Cell Communication and Cell Signaling

An integrin molecule is composed of two noncovalently associated transmembrane glycoprotein subunits called α and β.
TLS Online TPP Program

#Id: 1420

#Unit 4. Cell Communication and Cell Signaling

Integrins function as transmembrane linkers (integrators) between the extracellular matrix and the actin cytoskeleton.
TLS Online TPP Program

#Id: 1421

#Unit 4. Cell Communication and Cell Signaling

Integrins bind extracellular matrix (ECM) glycoproteins, 1. Laminins  
2. Collagens 
3. Fibronectin
4. Vitronectin