Heat shock protein 90 kDa α (cytosolic) class B member 1 isoform (HSP90AB1), actin cytoplasmic 1 (ACTB), and triosephosphate isomerase (TPI1) are prominent in the functional network derived from the comparison of breast cancer cells (MCF-7) and normal breast epithelial cells (MCF10A) without zinc exposure (Supplementary Figure 9a). Here, ACTB is linked to breast cancer.