The greater the effective nuclear charge the more tightly an electron is held in by the nucleus because there is less electron shield between the valence electrons and the nucleus, and so, the smaller the radius.

TLS Online TPP Program

#Id: 1893

#Unit 4. Cell Communication and Cell Signaling

Superantigens

Viral or bacterial proteins that bind simultaneously to the Vβ domain of a T-cell receptor and to the α chain of a Class II MHC molecule

TLS Online TPP Program

#Id: 1894

#Unit 4. Cell Communication and Cell Signaling

The decision of double-positive thymocytes to become helper CD4 or cytotoxic CD8 T cells.

TLS Online TPP Program

#Id: 1895

#Unit 4. Cell Communication and Cell Signaling

T-Cell Activation and Differentiation

TLS Online TPP Program

#Id: 1896

#Unit 4. Cell Communication and Cell Signaling

Regulatory T cells inactivate traditional T cells.

TLS Online TPP Program

#Id: 1897

#Unit 4. Cell Communication and Cell Signaling

Three signals are required for activation of a naïve T cell

TLS Online TPP Program

#Id: 1898

#Unit 4. Cell Communication and Cell Signaling

T-cell costimulatory