Diagnostics in monoplex/multiplex

Abstract

The present invention relates to a method of detecting and/or quantifying a target molecule from a sample obtained from a subject wherein the method comprises: (i) incubating a fusion protein or conjugate comprising a Ter binding polypeptide fused to at least one anti-target molecule or fragment thereof with a partially double-stranded oligonucleotide for a time and under conditions sufficient to bind to said Ter binding polypeptide thereby producing a complex; (ii) incubating said complex in the presence of said sample comprising said target molecule for a time and under conditions sufficient for said anti-target molecule to bind to said target molecule thereby producing a target-bound complex; (iii) incubating said target-bound complex in the presence of at least one immobilised molecule wherein said immobilised molecule has an affinity to said target molecule; (iv) incubating said immobilised molecule for a time and under conditions sufficient to bind to said target molecule thus immobilising said target molecule; and (v) detecting and/or quantifying said target molecule.