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22-06-2017
Biology

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After antigen recognition the correct sequence of events that lead to effector functions of t cells are

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29-06-2017

Costimulatory molecules like dendritic cells are needed for T-cell activation. They are the antigen presenting cells (APCs), and they interact with CD4 helper cells and CD8 T cells.
CD4-APC interaction allows APCs to release the signal molecules which activate the naive CD8 T cells.

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