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Activation of this lipid kinase is able to induce critical Rac-1 signaling pathways and can couple p21ras to cell survival mechanisms via the serine /threonine kinase Akt/PKB .
 p21ras, lipid kinase, Rac-1, serine /threonine kinase Akt/PKB
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:
 p21ras, lipid kinase, Rac-1, serine /threonine kinase Akt/PKB