The numbers of genes whose expression profiles are modified by single factor or multiple factors. The values in the ellipse are the numbers of the probes which were modified by the factor with the same color. For example, the sum of the numbers in red ellipse is 19+1+1+6 = 27 meaning that 27 probes were found modulated by the factor A. The underline(s) under each number suggested the amount and types of factors could regulate its expression profiles. For instance, the number 19 with a read underline means the expression profiles of the 19 genes can only be affected by factor A while the value 1 with a red and blue lines suggests that one gene was regulated by both Factor A and Factor B.
Xu and Faisal BMC Genomics 2010 11:341 doi:10.1186/1471-2164-11-341