CLDN18 and melanoma: We next determined the in vitro killing activity of CAR-T cells against both Panc02 cells and B16F10 mouse melanoma cells expressing either CLDN18.2 (Panc02-claudin 18.2 cell and B16F10-claudin 18.2 cell) or CLDN18.1 (Panc02-claudin 18.1 cell and B16F10-claudin 18.1 cell; Figure S2A).