Task: Named Entity Recognition
Input (English):  The results of the transient - transfection assay showed that the Sp1 binding element located in the core region ( positions - - 64 to + 1 ) of the alpha2 - integrin promoter plays an essential role in the alpha2 - integrin promoter activity and its downregulation by Erb - B2 .
Output (English): Sp1 binding element