Global gene expression survey with the Human Transcriptome Microarray. The Human Transcriptome Microarray is composed of over 51 145 ESTs of the UnigeneSet-RZPD3. This set of PCR-amplified clones was spotted on 2 slides. The scatter plots show the relative signal intensities of the red and green channel of representative experiments. This allows global survey of differential gene expression. Lines indicate 2-, 4-, and 8-fold difference in the relative signal intensity. The 2 corresponding scatter plots represent the 2 parts of the Human Transcriptome Microarray of the same hybridization experiment. The observed differential gene expression varied more in the SDF versus FDF in comparison to CD34⁺/CD38^– versus CD34⁺/CD38⁺.