An antibody array is a form of protein microarray which is a high-throughput technology for protein profiling. In this technology, a collection of antibodies is spotted and fixed on a solid surface such as glass, plastic, membrane, or silicon chip, and the interaction between the antibody and its target antigen is detected. It can be used to detect the levels of protein expression or post-translational modification (PTM). https://www.cd-biosciences.com/pathway-profiling-with-antibody-array.html