OriGene overexpression protein microarray chip was immunostained with ultraMAB anti-KRT8 mouse monoclonal antibody (Clone UMAB1). The positive reactive proteins are highlighted with two red arrows in the enlarged subarray. All the positive controls spotted in this subarray are also labeled for clarification. These data show that ultraMAB anti-KRT8 (Clone UMAB1) very specifically recognizes KRT8 antigen on OriGene protein microarray chip.