Gene Expression Analysis (IMAGE) University of Maryland Caption Researchers at the University of Maryland defined six interactions in which each gene in a pair could be expressed at a low, medium or high level. They then considered that each of those combinations could be associated with a "positive" or "negative" outcome for patient survival. That brought the total number of potential gene-pair relationship types to 12. When they analyzed data from 5,288 cancer tumors, they found 72,000 gene pairs fit into this grid and were associated positively or negatively with patient survival. Credit University of Maryland Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.