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Heat map showing gene expression patterns of MMP1, MMP9, MMP11, HPSE, and HPSE2. The heat map indicates up-regulation (red), down-regulation (green), and mean gene expression (black). The columns represent individual tissue samples covering three breast cancer subtypes: Luminal A (red), Luminal B (yellow), and Triple negative (purple) as well as normal samples (blue). The rows are labeled with individual gene symbols
