Fig. 1.

CD34⁺ cell transcription map in chromosome 21. (A) The positions of full-length cDNA, EST, and longSAGE tags in chromosome 21 of hg18. The RefSeq in the bottom line represents the known human genes. The map is integrated in the UCSC human genome browser. (B) A zoom-in view of the mapped transcripts at a locus containing AML1/RUNX1, the gene important for early hematopoiesis. Of the 5 ESTs mapped to this gene, 1 maps to the 3′ end but in an antisense orientation, and 4 map to the first intron; of the 17 mapped longSAGE tags, 2 map to the 3′ end, and 15 map to different introns of which 5 are in antisense orientation.