ABA is synthesized in almost all cells that contain chloroplasts

or amyloplasts and has been detected in every major organ and tissue. ABA is a 15-carbon terpenoid, or sesquiterpenoid, which is synthesized in plants by an indirect pathway via 40-carbon carotenoid intermediates

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#Unit 4. Cell Communication and Cell Signaling

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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#Id: 1914

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 1915

#Unit 4. Cell Communication and Cell Signaling

T-dependent (TD) response

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#Id: 1916

#Unit 4. Cell Communication and Cell Signaling

T-independent response

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#Id: 1917

#Unit 4. Cell Communication and Cell Signaling

B-Cell Activation

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#Id: 1918

#Unit 4. Cell Communication and Cell Signaling

Generation of antibodies to T-dependent antigens