| abstract |
To detect proteins containing phosphorylated tyrosine, the sample of a body fluid is incubated with at least two receptors R<1> and R<2>, there being generation of a change in a signal owing to binding of at least the receptors R<1> and R<2> to the substance to be detected in the sample solution, and where in each case one of the two receptors contains an antibody, or its derivative, which is able to bind specifically to the protein to be detected, and the other receptor contains an antibody, or its derivative, able to bind specifically to phosphorylated tyrosine, and the change in the signal in the sample caused by the binding is determined. |