9204
Further optimization of culture conditions, type of Antigen Presenting Cells ( APC ), peptides , use of stabilizers like beta 2-m are still needed.
 APC, beta 2-m, Antigen Presenting Cells
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:
 APC, beta 2-m, Antigen Presenting Cells