553 First-in-class inhibitors of ERAP1 alter the immunopeptidome of cancer, driving a differentiated T cell response leading to tumor growth inhibition by Peter Joyce, Martin Quibell, Jason Shiers, Carmen Tong, Kristopher Clark, Nicola Ternette, Andrew Leishman, Kate Anderton, Jessica Sette, Wayne Paes

140 Development of first-in-class ERAP2 inhibitors to modulate the cancer immunopeptidome by Peter Joyce, Martin Quibell, Jason Shiers, Kristopher Clark, Nicola Ternette, Kate Anderton, Wayne Paes, Michael Berry, Sam Humphrey, Ionut Dragomir, Joud Sabouni, Samantha Garside