Figure 2: Potential applications of protein microarray in biochemistry and molecular biology. It can be used for biomarker identification from a number of different diseases by profiling candidates present in patients and healthy control subjects. By using the small molecule profiling application, it can also be an ideal drug discovery tool to identify drug targets and understand their mechanisms of action. Besides, it can be performed for functional analysis to identify protein-protein interactions and substrates or enzymes in posttranslational modification.