Simultaneous detection of both RNA and protein in individual single cells offers a powerful tool for genotype-to-phenotype investigations. Proximity extension assay (PEA) is a quantitative, sensitive, and multiplex protein detection system that has superb utility in single-cell omic analysis. We implemented PEA using the flexible microfluidic workflow of the Fluidigm® C1™ system followed by real-time quantitative polymerase chain reaction (RT-qPCR) on the Fluidigm Biomark™ HD system. With this workflow, targeted quantification of RNAs and proteins within individual cells is readily conducted.
Keywords: Antibody detection; Microfluidics; Multi-omics; Protein quantification; Protein–RNA correlation; Proximity extension assay (PEA); RT-qPCR; Single-cell analysis; Single-cell protein detection; qPCR.