4569
125I- IL-13 did not bind to colon cancer cell lines , but unlabeled IL-13 competed for the binding of 125I-IL-4 .
 IL-13, 125I- IL-13, colon cancer cell lines, IL-13, 125I-IL-4
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:
 IL-13, 125I- IL-13, colon cancer cell lines, IL-13, 125I-IL-4