4390
By using 70Z/3-derived pre-B-cell lines either lacking or expressing human CD14 (the LPS receptor ), it was observed that expression of human CD14 imparted responsiveness to LPS but not to OspA or spirochetal lipopeptides (assessed by induction of NF-kappa B and expression of surface immunoglobulin M ).
 LPS receptor, spirochetal lipopeptides, human CD14, 70Z/3-derived pre-B-cell lines, surface immunoglobulin M, human CD14, NF-kappa B, OspA
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:
 LPS receptor, spirochetal lipopeptides, human CD14, 70Z/3-derived pre-B-cell lines, surface immunoglobulin M, human CD14, NF-kappa B, OspA