Expression of cell-specific markers in milk and mammary transcriptomes. Each box in the heatmap represents log-transformed expression intensity. The color key indicates the level of expression: Green = low/no expression, Yellow = low expression, Orange = moderate expression, Pink = high expression, and White = very high expression. The color key also includes a light blue line that indicates the number of observations at each level of expression.
Lemay et al. BMC Genomics 2013 14:872 doi:10.1186/1471-2164-14-872