MYC and cancer: Furthermore, the presence of binding sites for known mediators of canonical Wnt signalling LEF/TCF and the direct Wnt target MYC upstream of Slc7a5, along with ChIP‐seq data, showing that β‐catenin binds the Slc7a5 promoter in the Xenopus embryo 86 and ChIP‐PCR data demonstrating that MYC directly binds the Slc7a5 promoter in human cancer cell lines and promotes Slc7a5 transcription 19 strongly support the possibility that Slc7a5 is a direct Wnt‐β‐catenin/MYC target in the mouse embryo.