Genes in ridges and antiridges can have tissue-specific expression patterns. (A) Expression pattern of 25 genes in a ridge on chromosome 9. The region of the ridge is indicated in Figure 1 by a red bar. The figure is taken from the HTMseq Web site and represents the concise view level of the application. Each horizontal line gives the TU number, the start nucleotide position of the gene on chromosome 9, the level of expression of the gene in 16 tissue-type SAGE libraries, and the description line of the TU. The level of expression is given by a color code ranging from 0–25 tags/100,000 tags in the SAGE library (see color scale at top). The SAGE libraries shown are (1) brain normal; (2) brain normal cerebellum; (3) brain normal white matter; (4) breast normal; (5) colon normal; (6) heart normal; (7) kidney normal; (8) leucocyte normal; (9) liver normal; (10) lung normal; (11) ovary normal; (12) pancreas normal; (13) peritoneum normal; (14) prostate normal; (15) vascular endothelium normal; (16) all normal tissues; (B) The same analysis for an antiridge on chromosome 9 (indicated by blue bar in Fig. 1). The SAGE libraries are as indicated above.
