13120
LMP1 expression induces phenotypic changes resembling B cell activation , such as cell size increase and up-regulation of cell surface activation markers .
 cell surface activation markers, LMP1
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:
 cell surface activation markers, LMP1