Suitable antibody assay labels are known in the art and include {HEAD ~ enzyme labels}, such as glucose oxidase; radioisotopes, such as {TAIL ~ iodine} , carbon , sulfur , tritium , indium , and technetium ; luminescent labels, such as luminol; and fluorescent labels, such as fluorescein and rhodamine, and biotin 
Suitable antibody assay labels are known in the art and include { HEAD ~ enzyme labels } , such as glucose oxidase ; radioisotopes , such as { TAIL ~ iodine } , carbon , sulfur , tritium , indium , and technetium ; luminescent labels , such as luminol ; and fluorescent labels , such as fluorescein and rhodamine , and biotin
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