Abstract: Macromolecule compositions and related methods that effect targeted delivery of therapeutic agents to effector targets in a desired cell, tissue and/or organ of interest while minimizing or avoiding undesirable delivery to other cells, tissues or organs are provided. Compositions and methods related to macromolecules, such as an ANDbody™, that include an effector target binding domain specific for an effector target, and an address binding domain specific for an address target are described. The macromolecules are linked to small molecules.