1513
When ordered according to stage of maturation, the amount of constitutive NF-kappa B was not increased in more mature cell lines .
 NF-kappa B, mature cell lines
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:
 NF-kappa B, mature cell lines