T-Cell
Activation
un
seel
.com · signal 1 · signal 2 · signal 3 · clonal expansion
stage
naive
signal
—
progeny
1 cell
focus
—
naive T cell
dendritic cell (APC)
signal 1: TCR-MHC
signal 2: CD28-B7
signal 3: IL-2 cytokine
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Un
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.com · T-Cell Activation