The present invention provides a method of directing a moiety to breast
vasculature in a subject by administering to the subject a conjugate
which contains a moiety linked to a homing molecule that selectively
homes to breast vasculature, whereby the moiety is directed to breast
vasculature. In one embodiment, the homing molecule is a peptide
containing the amino acid sequence PGPEGAG (SEQ ID NO: 1), or a
peptidomimetic thereof.