12846
However, MAPK activation was easily detected by in vitro kinase assays , after FcR cross-linking with immune complexes .
 FcR, MAPK, immune complexes
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:
 FcR, MAPK, immune complexes