2438
Electrophoretic mobility shift analysis of protein - DNA complexes formed with nuclear proteins isolated from I3C - treated and - untreated cells , in combination with supershift assays using Sp1 antibodies , demonstrated that the Sp1 - binding site in the CDK6 promoter forms a specific I3C - responsive DNA - protein complex that contains the Sp1 transcription factor .
 GENE: Sp1 antibodies; GENE: Sp1 - binding site; GENE: CDK6 promoter; GENE: Sp1 transcription factor
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 antibodies; GENE: Sp1 - binding site; GENE: CDK6 promoter; GENE: Sp1 transcription factor