10233
These results indicate that Bcl-2 acts downstream of MAPK kinase-1 but upstream of MAPK and suggest that, in the signaling pathway of the apoptotic process induced by bufalin , the transcriptional activity of activator protein-1 may be down-regulated through the inhibition of MAPK activity by Bcl-2 .
 MAPK, Bcl-2, Bcl-2, activator protein-1, MAPK, MAPK kinase-1, 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:
 MAPK, Bcl-2, Bcl-2, activator protein-1, MAPK, MAPK kinase-1, MAPK