8631
However , inhibition of both the ERK / RSK and the p38 / MAPKAP kinase 2 pathways completely abolished NGF - induced CREB Ser - 133 phosphorylation .
 ERK, RSK, p38, MAPKAP kinase 2, NGF, CREB
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 ERK, RSK, p38, MAPKAP kinase 2, NGF, CREB