The Myc tag, derived from the human c-myc gene, is a peptide epitope tag used in detection or purification of recombinant proteins. The 10-residue peptide sequence consists of EQKLISEEDL and has a mass of approximately 1202 Da. It can be fused to the N- or C- terminal end of a protein, but placement directly behind of the signal peptide of secreted proteins may interfere with their translocation. Antibodies to the myc tag can be used in the analysis of myc-tagged proteins.