Patent ID: 7045606

Claim:
A ligand comprising: wherein n is an integer ranging from 1 to 5 Y is —CO 2 H or —PO 3 H 2 T represents —X or —phenyl—X, wherein X represents —NO 2 , —NH 2 , —NCS, —NHCOCH 2 —Z, —NHCO—W—COCNHS, —NH-Q, —NHCS—Q, —NHCOCH 2 —Q, or —NHCO(CH 2 ) m —Q, where Q is a hapten selected from the group consisting of steroids, enzymes, proteins, monoclonal antibodies, chimeric antibodies, fragments thereof and any activated linker ready for coupling reaction, W is —(CH 2 ) m — m is an integer ranging from 1 to 10, and Z is chloride, bromide or iodine.