Illustration of binding of peptide epitopes from endogenous antigens to MHC-I molecules by a virus-infected cell

Animation of binding of epitopes from endogenous antigens to MHC- I molecules in an infected cCell

Summary of T4-lymphocytes

Illustration of a cytotoxic T-lymphocyte (CTL)-Induced apoptosis of a virus-infected cell,

Animation of a cytotoxic T-lymphocytes (CTL) using perforins and granzymes to induce apoptosis of a virus-infected cell

Animation of cytotoxic T-lymphocyte (CTL)-induced apoptosis of a virus-infected cell

Animation of a cytotoxic T-lymphocyte (CTL) inducing apoptosis of a virus-infected cell by Fas and FasL interaction

Summary of T8-lymphocytes

Illustration of a naive T4-lymphocyte recognizing epitope and MHC-II on an antigen-presenting dendritic cell

Animation of binding of epitopes from exogenous antigens to MHC-II molecules in a dDendritic cell

Animation of activation of a naive T4-lymphocyte by an antigen-presenting cell

Illustration of binding of peptide epitopes from exogenous antigens to MHC-II molecules

Illustration of proliferation of activated B-lymphocytes

Illustration of differentiation of B-lymphocytes into plasma cells and B-memory cells

Illustration of an effector T4-lymphocyte recognizing epitope and MHC-II on an activated B-lymphocyte and producing cytokines to trigger proliferation and differentiation

Animation of NK cell interacting with a virus-infected cell or a cancer cell not expressing MHC-I molecules

Animation of apoptosis by NK cells

Illustration of binding of peptide epitopes from endogenous antigens to MHC-I molecules by a dendritic cell

Illustration of an antigen-presenting dendritic cCell presenting MHC-I with bound peptide to a naive T8-lymphocyte having a complementary T-cell receptor

Animation of binding of epitopes from endogenous antigens to MHC- I molecules in a dendritic cell

Animation of an MHC- I molecule on an antigen-presenting dendritic cell presenting a bound viral epitope to a naive T8-lymphocyte with a matching TCR and CD8 on its surface

Illustration of binding of peptide epitopes from endogenous antigens to MHC-I molecules by a virus-infected cell

Animation of binding of epitopes from endogenous antigens to MHC- I molecules in an infected cCell

Illustration of neutralization of exotoxins

Illustration of binding of peptide epitopes from endogenous antigens to MHC-I molecules by a virus-infected cell

Animation of binding of epitopes from endogenous antigens to MHC- I molecules in an infected cCell

Animation of a macrophage processing an antigen for presentation to an effector T-helper lymphocyte

Illustration of activation of a macrophage by a T4-effector lymphocyte

Illustratrion of a macrophage binding peptides from exogenous antigens to MHC-II molecules

Animation of activation of a macrophage by a T4-effector lymphocyte

Animation of ADCC by NK cells

Illustration of opsonozation of helminths