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Effector pathways for this guanine nucleotide binding protein in T cells are mediated by the serine/threonine kinase Raf-1 and the Ras-related GTPase Rac-1 .
 Raf-1, Ras-related GTPase, guanine nucleotide binding protein, serine/threonine kinase, Rac-1, T cells
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:
 Raf-1, Ras-related GTPase, guanine nucleotide binding protein, serine/threonine kinase, Rac-1, T cells