Technical Information and Data Download

Normalization and Data Processing

All expression data was obtained from Affymetrix MOE 430 2.0 chips. Normalization and expression modeling were performed in the R statistical computing environment, with extensive use of the Bioconductor suite of R packages. In particular, probe level summaries were computed using the GC-RMA method (Wu et. al (2003)). The GC-RMA normalized data for each treatment and for the entire study are available for download through this site.

Purification Schemes

This link leads to a table showing the schemes used to purify each cell type. All cells were primary cells freshly isolated using a combination of magnetic and flow cytometric sorting with the indicated markers. Initial populations were derived from the tissue indicated in the third column (1)- activated T cells were obtained by stimulation with conconavalin A for 8-11 hours in vitro. Because of the difficulty in obtaining RNA from terminally differentitated erythroid cells, the erythrocyte population is the only one that contains substantial numbers of cell-type specific progenitors. The correlation coefficient (R2) that indicates the similarity between the two arrays for each population is indicated in the leftmost column.


Purification SchemesHTML | Excel

Correlation Coefficients

Shown below is a table of the correlation coefficients between each microarray chip. An R2 of 0.96 or greater was seen between replicates.


Correlation CoefficientsHTML | Excel

Normalized Data

The link below contains an Excel worksheet of the normalized data set.


Normalized Data (Excel)gzip (3 MB) | bz2 (2 MB)

CEL Files

Each link below leads to the raw CEL file for the chip indicated.

Note: .gz files are about 6.2MB and .bz2 files are about 4.6MB.


HSC 1gzip | bz2
HSC 2gzip | bz2
NK 1gzip | bz2
NK 2gzip | bz2
T-CD4-A 1gzip | bz2
T-CD4-A 2gzip | bz2
T-CD8-A 1gzip | bz2
T-CD8-A 2gzip | bz2
T-CD4-N 1gzip | bz2
T-CD4-N 2gzip | bz2
T-CD8-N 1gzip | bz2
T-CD8-N 2gzip | bz2
B-Cell 1gzip | bz2
B-Cell 2gzip | bz2
Monocyte 1gzip | bz2
Monocyte 2gzip | bz2
Granulocyte 1gzip | bz2
Granulocyte 2gzip | bz2
N-Er 1gzip | bz2
N-Er 2gzip | bz2

All CEL Filesgzip (124MB) | bz2 (92MB)