In a standard cell viability assay, unstimulated T cells were co-cultured with the ROR1 positive PANC1 pancreatic ductal adenocarcinoma cell line at a 1:1 effector:target ratio (E:T) in the presence of either ROR1 BiTE or control CD19 BiTE. This evidence concerns the gene CD19 and pancreatic ductal adenocarcinoma.