To validate the in vivo use of our antibody for the CSC marker CD133, we compared SUM149PT triple-negative breast cancer (TNBC) xenograft models treated with vehicle or the CSC-targeting focal adhesion kinase (FAK) inhibitor VS-6063 (defactinib; formerly PF-04554878) [13]. Here, PROM1 is linked to triple-negative breast carcinoma.