CD36 and cancer: Based on the low expression levels of CD36 in cancer cells (PC-3, MCF-7 and HT-29) showed by CD36 antibody staining (PC-3 and MCF-7) from the Human Protein Atlas portal (www.proteinatlas.org) [43] and CD36 RNA expression of HT-29 and MCF-7 from the Expression Atlas (http://www.ebi.ac.uk/gxa) [44] databases, these cell lines were not examined in the cell migration assay.