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TLS Online TPP Program

#Id: 2454

Negative control of the lac operon. 

No lactose; repression. The lacI gene produces repressor, which binds to the operator and blocks RNA polymerase from transcribing the lac genes.

#Unit 3. Fundamental Processes #Transcription elongation and termination #Part B Pointers
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TLS Online TPP Program

#Id: 1443

#Unit 4. Cell Communication and Cell Signaling

Hemidesmosomes
Function- Shape, rigidity, signaling
TLS Online TPP Program

#Id: 1444

#Unit 4. Cell Communication and Cell Signaling

Focal adhesions 
Adhesion type- Cell-matrix
Adhesion receptors- Integrins
Cytoskeletal attachment- Actin filaments
TLS Online TPP Program

#Id: 1445

#Unit 4. Cell Communication and Cell Signaling

Focal adhesion
Function- Shape, signaling, force transmission, cell movement
TLS Online TPP Program

#Id: 1446

#Unit 4. Cell Communication and Cell Signaling

Tight junctions seal off body cavities and restrict diffusion of membrane components.
TLS Online TPP Program

#Id: 1447

#Unit 4. Cell Communication and Cell Signaling

Tight junctions prevent the diffusion of: 
Macromolecules
Small water-soluble molecules
Ions
Membrane proteins 
Glycolipids
TLS Online TPP Program

#Id: 1448

#Unit 4. Cell Communication and Cell Signaling

Ca2+-dependent cadherin- mediated adhesion also plays an important role in tight-junction formation, stability, and function.