Contained within each cluster are genes whose expression was previously associated with pancreatic adenocarcinoma, including keratin 19 (KRT19), anterior gradient 2 homolog (AGR2), v-erb-b2 avian erythroblastic leukemia viral oncogene homolog 3 (ERBB3), mesothelin (MSLN), and prostate stem cell antigen (PSCA) [5], [26]–[28]. Here, ERBB3 is linked to pancreatic adenocarcinoma.