Ontario Cancer Institute (OCI, Toronto, Canada) human single-spotted 19k (version 6) microarray consisting of 19,008 characterized and unknown human ESTs from Image Consortium each with a unique Genbank ID.. Slide specifications:. Grid Rows: 12. Grid Colums: 4. Rows: 20. Columns:;20. Grid to Grid Distance (um): 4500. Spot to Spot Distance (um): 200