Abstract: The invention concerns a novel parallel method for detecting biological material, in particular peptides or proteins, in a sample at least one probe for use in the said method, a plurality, or library, of said probes for use in said method, and a kit of parts for carrying out said method wherein said probe comprises a binding partner that is specific for said peptide or protein and, attached thereto, an oligonucleotide comprising: i) a first sequence that is complementary to a forward primer sequence for amplification of said oligonucleotide; ii) a second sequence that is complementary to a reverse primer sequence for amplification of said oligonucleotide; and iii) positioned between said first and second sequences an identification sequence of nucleotides or barcode.