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