The S and M clusters. The transcription profiles are displayed as described in the legend to Figure . (A) Histone cluster. The eight genes encoding histones and the yeast histone H1 homologue cluster very tightly and are expressed during S phase of the yeast cell cycle. (B) MET cluster. The expression of many of the members of the methionine pathway peaks just after the histones. (C) CLB2 cluster. A subcluster of genes that are expressed similarly to CLB2 highlights genes that peak during M phase.
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