G-Rich Clusters in the Promoter Regions of

2 G-Rich Clusters in the Promoter Regions of Mammalian Genes 

Chicken P-globin Human sMtCK Mouse MCK Mouse al integrin Human c-myc Human FMRl Human insulin 

Evaluation of the relative potencies of the three polymerase arrest sites revealed that the major molecular blocking structure was located at the 3 -most thymine residue, whereas the two other sites blocked polymerase progression more weakly. By employing the chemical probes dimethyl sulfate and OSO4, 

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