12646
The results of reporter gene analyses revealed that the insulin gene promoter is more sensitive to glycation than the control beta-actin gene promoter ; approximately 50 and 80% of the insulin gene promoter activity was lost when the cells were kept for 3 d in the presence of 40 and 60 mM D-ribose , respectively.
 insulin gene promoter, insulin gene promoter, reporter gene, beta-actin gene promoter
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 insulin gene promoter, insulin gene promoter, reporter gene, beta-actin gene promoter