Fig. 6

Heat map iillustrating the expression patterns of 192 biomineralization-related genes across various steps of pearl sac and pearl formation. Each column contains the measurements for gene expression change for a single sample. Relative gene expression is indicated by colour: high-expression (red), median-expression (white) and low-expression (blue). Black cells represent very little or no expression. Genes and samples with similar expression profiles are grouped by hierarchical clustering (left and top trees). These 192 genes are listed in Table 2 sequentially