6747
Electrophoretic mobility shift assays using crude extracts from FREJ4 cells revealed the binding of a member ( s ) of the Ets family of transcription factors to the P4 EBS , as well as the interaction of two members of the Sp1 family , Sp1 and Sp3 , with the adjacent GC box .
 Ets family of transcription factors, P4 EBS, Sp1 family, Sp1, Sp3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Ets family of transcription factors, P4 EBS, Sp1 family, Sp1, Sp3