Frataxin/FXN protein activates the core iron-sulfur cluster assembly complex and accelerates sulfur transfer for [2Fe-2S] cluster assembly. It plays a key role in the de novo synthesis of clusters, delivering persulfide to the ISCU. Frataxin/FXN Protein, Human (His, Myc) is the recombinant human-derived Frataxin/FXN protein, expressed by E. coli , with C-Myc, N-10*His labeled tag.