Characterization of an evolutionarily conserved far-upstream enhancer in the human alpha 2(I) collagen (COL1A2) gene.
We have examined the chromatin structure around and upstream of the transcriptional start site of the human alpha2(I) collagen (COL1A2) gene. Four strong DNase I-hypersensitive sites (HS2-5) were only detected in fibroblasts, and a weaker one (HS1) was identified in type I collagen-negative cells. Another hypersensitive site potentially involved in COL1A2 silencing was found in intron 1 (HS(In)). HS1 and HS2 were mapped within conserved promoter sequences and at locations comparable to the mo...Expand abstract
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