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Relation and polarity of clusters obtained from mac1 array experiment when all the significant genes are used. Cn, cluster label; >, the cluster on the left completely contains the cluster on the right; ++, all the genes in the cluster are up-regulated; +, at least 80% of the genes in the cluster are up-regulated; – –, all the genes in the cluster are down-regulated; –, at least 80% of the genes in the cluster are down-regulated.
