The ProPlate multi-array system (P37004) from Grace Bio-Labs allows integration of microscope array technology with automated microtitre plate processing. Individual modules (P37001), covered with seal strips, fit into a tray (P37003), producing a modular plate with a standard microtitre plate footprint, and well spacing. The modular design allows loading of 1--4 slides per tray for plate washing and reading. Individual ProPlate modules may also be processed by hand without the use of the tray. The large well volumes and isolation of 16 individual arrays (2x8) on a single microscope slide is particularly well suited for proteomics applications, including protein expression analysis, protein-protein interactions, antibody profiling, and HTP automated analysis of multiple proteins. The ProPlate system can also be used to process cDNA or oligonucleotide arrays.