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Gene expression during the yeast cell cycle. In this figure genes correspond to the rows, and the time points of each experiment are the columns. The ratio of induction/repression is shown for each gene such that the magnitude is indicated by the intensity of the colors displayed. If the color is black then the ratio of control to experimental cDNA is equal to 1, while the brightest colors (red and green) represent a ratio of 2.8 to 1. Ratios greater than 2.8 are displayed as the brightest color. In all cases red indicates an increase in mRNA abundance while green indicates a decrease in abundance. Gray areas (when visible) indicate absent data, or data of low quality. Colored bars on the side of the figure indicate the phase group to which a gene belongs (M/G1, yellow; G1, green; S, purple; G2, red; M, orange). These same colors indicate cell cycle phase along the top of the figure. (B) Genes that share similar expression profiles are grouped by a clustering algorithm as described in the text. The dendragram on the left side of the figure shows the structure of the cluster.
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