To find MUC1 (Mucin1) as a marker for breast cancer, Wang et al. developed a cDNA-Fc/MXene probe based on a competitive electrochemical biosensor in a different investigation.213 The transmembrane glycoprotein MUC1 is of interest for detection because of its abnormal expression in tumour tissues.39 To improve diagnostic signals and provide a high number of binding sites for cDNA-Fc, MXene was used as a cDNA-Fc nano carrier. This evidence concerns the gene MUC1 and breast carcinoma.