gland and secreted into the bloodstream. TDF and TDF-P1, a 20-amino acid peptide
selected from the open reading frame of TDF, induce differentiation in human breast and
prostate cancer cells but not in other cells. TDF protein has no identified site of action or
receptor, and its mechanism of action is unknown. Here, we used TDF-P1 to purify and
identify potential TDF receptor (TDF-R) candidates from MCF7 steroid-responsive breast …