11610
Involvement of G protein in the activation of MAPK pathway by TCC was indicated by inhibition of Raf-1 and ERK1 kinase activity, as well as the DNA synthesis by pretreatment of cells with pertussis toxin .
 ERK1, pertussis toxin, Raf-1, TCC, G protein, MAPK
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:
 ERK1, pertussis toxin, Raf-1, TCC, G protein, MAPK