This invention provides novel polydentate selective high affinity ligands (SHALs) that can be used in a variety of applications in a manner analogous to the use of antibodies. SHALs typically comprise a multiplicity of ligands that each bind different region son the target molecule. The ligands are joined directly or through a linker thereby forming a polydentate moiety that typically binds the target molecule with high selectivity and avidity.
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT
 This work was supported in part by grant No: CA047829 from the National Institutes of Health, National Cancer Institute. In addition, pursuant to Contract No: DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security LLC for the operation of Lawrence Livermore National Laboratory, the Government of the United States of America has certain rights in this invention.