3919
Furthermore, an inverse relationship was also observed between the LDL receptor gene expression at the transcriptional level and the binding affinity of this 47 kDa protein factor to the SRE sequence .
 ( DNA: LDL receptor gene, None) , ( DNA: SRE sequence, None) , ( protein: LDL receptor, None) , ( protein: 47 kDa protein factor, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( DNA: LDL receptor gene, None) , ( DNA: SRE sequence, None) , ( protein: LDL receptor, None) , ( protein: 47 kDa protein factor, None) 