Gene expression levels for 500 genes from a 2x2 factorial experiment on MCF7 breast cancer cells using Affymetrix HGU95av2 arrays.
An ExpressionSet object with 500 genes, 8 samples, and 2 variables.
The factors in this experiment were estrogen (ES: P or A) and length of exposure (TIME: 10 or 48 hours). Gene expression values were estimated using rma after quantile normalization (see the 'affy' package). Expression estimates are reported log base 2, as suggested by the rma method.
Scholtens et al. Analyzing Factorial Designed Microarray Experiments. Journal of Multivariate Analysis. 2004;90(1):19-43.
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