The present invention provides conjugate compounds comprising (a) an active compound; (b) optionally, but in some embodiments preferably, an affinity binding agent; and (c) a block copolymer, the block copolymer comprising: (i) a first elastin-like polypeptide having a first Tt and (U) a second elastin-like polypeptide having a second Tt greater than the first Tt. Method for the targeted delivering of an active compound in vivo to a selected region within a subject with such agents are also described.