The SARS-CoV-2 Membrane Protein Proximity Ligation Assay (PLA) Kit (Cy3) enables the detection of SARS-CoV-2 membrane protein in virus-infected tissue or infected/transfected cell block samples. The viral membrane protein is detected using two oligonucleotide-conjugated primary antibodies, called PLA probes. Only when both PLA probes bind to the membrane protein can the assay generate an amplified signal. This provides researchers with a highly specific and sensitive diagnostic tool.