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Our results suggest that Sp1 binding site can function as a distinct TGF - beta responsive element for TGF - beta mediated promoter expression and Sp1 per se can mediate this response .
 GENE: Sp1 binding site; GENE: TGF - beta responsive element; GENE: TGF - beta; GENE: Sp1
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: Sp1 binding site; GENE: TGF - beta responsive element; GENE: TGF - beta; GENE: Sp1