11478
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 .
 C / EBPs, Sp1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 C / EBPs, Sp1