UCP3 and breast cancer: Expression levels of selected genes in skeletal muscle are shown in Figure 6C. Compared with NF and HF controls, MET and BC+MET mice had highly increased muscle expression levels of genes for proteins involved in fatty acid extraction from triglycerides of circulating lipoproteins (Lpl), cellular and mitochondrial uptake of fatty acids (Cd36), mitochondrial fatty acid oxidation (Cpt1b, Mcad, Ucp3) and basal glucose uptake (Slc2a1).