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T-Cell Epitopes

Proteasomal cleavage sites of proteins for cytotoxic T cells may soon be fully predictable

Published in Vaccine Weekly, September 3rd, 2003

There are methods available for predicting where the proteasome will cut epitopes that get presented to cytotoxic T cells, but they are still not completely accurate.

According to recent research published in the journal International Immunology, "The proteasome plays an essential role in the immune responses of vertebrates. By degrading intercellular proteins from self and non-self, the proteasome produces the majority of the peptides that are presented to cytotoxic T cells (CTL).

"There is accumulating evidence that the C-terminal, in particular, of CTL epitopes is cleaved precisely by the proteasome, whereas the N-terminal is produced with...

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