tokens: Deletion analysis showed that the -321 / +41 sequence was sufficient for both the constitutive promoter activity and auto-activation and electrophoretic mobility shift assays identified the interaction of C / EBPs and Sp1 to this region .
folded_tokens: deletion analysis show that the -321 / +41 sequence be sufficient for both the constitutive promoter activity and auto-activation and electrophoretic mobility shift assay identify the interaction of c / ebp and sp1 to this region .