14998
Importantly , intraplantar injection of Complete Freund ' s Adjuvant ( CFA ) naturally activated spinal PTPs to initiate Src signaling , because PTPs inhibition significantly repressed Src activity , reduced Src phosphorylation of NR2B , decreased NR2B synaptic accumulation and eventually ameliorated inflammatory pain .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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