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Human Toll-like receptor 2 ( TLR2 ) is a signaling receptor that responds to LPS and activates NF-kappaB .
 signaling receptor, Human Toll-like receptor 2 ( TLR2 ), TLR2, NF-kappaB
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:
 signaling receptor, Human Toll-like receptor 2 ( TLR2 ), TLR2, NF-kappaB