EXPRESSED STSS AND TRANSCRIPTION OF HUMAN XQ28

STSs, which have been used to build and format clone contigs, have bee n used here to assemble a transcriptional map across a cytogenetic ban d. Of fifty one STSs in Xq28, 20 were positive by RT-PCR. Thus, an add itional 20 possible ESTs were detected among the STSs, and seven of th ese also identified cDNAs in at least one library. The transcripts con firm the high expression level of this region, correlated with its GC compositional map and CpG island content.