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To further elucidate the role of this variant octamer motif in the regulation of germline transcription from the unrearranged kappa locus , we have quantitated the relative binding affinity of Oct-1 and Oct-2 for the variant octamer motif and determined the functional role of this octamer motif in transcriptional activation .
 ( DNA: germline, None) , ( protein: Oct-1, None) , ( DNA: octamer motif, None) , ( DNA: octamer motif, None) , ( protein: Oct-2, None) , ( DNA: kappa locus, None) , ( DNA: octamer motif, 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: germline, None) , ( protein: Oct-1, None) , ( DNA: octamer motif, None) , ( DNA: octamer motif, None) , ( protein: Oct-2, None) , ( DNA: kappa locus, None) , ( DNA: octamer motif, None) 