8901
Blocked shift / supershift analysis indicates that Fos family member proteins especially Fra - 1 and Fra - 2 are related to progression and no changes found in the Jun family member proteins although they are present in the AP - 1 / DNA binding complex .
 Fos family, Fra - 1, Fra - 2, Jun family, AP - 1 / DNA binding complex
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 Fos family, Fra - 1, Fra - 2, Jun family, AP - 1 / DNA binding complex