Epithelial-Mesenchymal Transition

An orderly series of events whereby epithelial cells are transformed into mesenchymal cells.

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#Id: 9994

#Unit 4. Cell Communication and Cell Signaling

The Wnt-Ca2+ pathway is initiated by Frizzled receptors activating a classical G protein-coupled signaling pathway.

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#Id: 1635

#Unit 4. Cell Communication and Cell Signaling

MAC is the binding and polymerization of C9 to the C5b678 complex, completed MAC, which has a tubular form and functional pore diameter of 70 Å to 100 Å.

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#Id: 2307

#Unit 3. Fundamental Processes

During the transition to the open complex, the conformation of both the RNA polymerase and the DNA change. 

1) 90° bend in the DNA, which allows the template strand to approach the active site of the enzyme; 

2) strand opening of the promoter DNA between -11 and +3 with respect to the transcription start site; 

3) the promoter DNA scrunches into the active channel forming the transcription bubble; and 

4) closing of the jaws of the enzyme to encircle the section of the promoter downstream section of the transcription start site.

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#Id: 7248

#Unit 5. Developmental Biology

T2 cells also express BAFF-R, the receptor for the B-cell survival factor BAFF, whose expression is dependent on signals received through the BCR. 

As B cells differentiate from the transitional T2 state to full maturity, they raise their levels of mIgD still further, while reducing the expression of mIgM. They also cease to express CD24 and CD93.

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#Unit 2. Cellular Organization

Carboxysomes containing bacteria are nitrifying bacteria, cyanobacteria and thiobacilli