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The CK-1 /CD28RE of GM-CSF shows a high degree of similarity to the IL-2 CD28RE and the IL-3 gene also contains a related region.
 CK-1, CD28RE, IL-2, IL-3 gene, /CD28RE, GM-CSF
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:
 CK-1, CD28RE, IL-2, IL-3 gene, /CD28RE, GM-CSF