tokens: Analysis of SRE oligonucleotide gel mobility shift assays with nuclear extracts from Sertoli cells demonstrated the presence of both the SRF and the ubiquitously expressed bHLH protein E12 / E47 .
folded_tokens: analysis of sre oligonucleotide gel mobility shift assay with nuclear extract from sertoli cell demonstrate the presence of both the srf and the ubiquitously express bhlh protein e12 / e47 .