Chromogenic tracers for use in an assay
First Claim
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1. A tracer for use in an assay comprising:
- a chromogen conjugated to a ligand through a spacer radical, said spacer radical for conjugating the chromogen to the ligand being derived from an amino acid and having the following structural formula;
##STR6## wherein X is selected from the group consisting of hydrogen, ammonium, amine salt and metal cations;
Y is selected from the group consisting of --NH-- and ##STR7## and R is selected from the group consisting of substituted and unsubstituted divalent hydrocarbon radicals having no more than 13 carbon atoms and wherein --R-- and --CH-- may be linked to form a carbocyclic radical.
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Abstract
A chromogen, in particular, a fluorescent compound, is conjugated to a ligand through an amino acid spacer radical, which includes a free carboxyl group. The tracers are particularly suitable for use in a flow through assay for low molecular weight analytes. The tracers are rapidly bound, of good sensitivity, and low non-specific binding.
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42 Claims
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1. A tracer for use in an assay comprising:
- a chromogen conjugated to a ligand through a spacer radical, said spacer radical for conjugating the chromogen to the ligand being derived from an amino acid and having the following structural formula;
##STR6## wherein X is selected from the group consisting of hydrogen, ammonium, amine salt and metal cations;Y is selected from the group consisting of --NH-- and ##STR7## and R is selected from the group consisting of substituted and unsubstituted divalent hydrocarbon radicals having no more than 13 carbon atoms and wherein --R-- and --CH-- may be linked to form a carbocyclic radical. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
- a chromogen conjugated to a ligand through a spacer radical, said spacer radical for conjugating the chromogen to the ligand being derived from an amino acid and having the following structural formula;
Specification