14991
Tyrosine phosphorylation of N - methyl - d - aspartate ( NMDA ) subtype glutamate receptors by Src - family protein tyrosine kinases ( SFKs ) plays a critical role in spinal sensitization .
 Tyrosine, N - methyl - d - aspartate, NMDA, glutamate, tyrosine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Tyrosine, N - methyl - d - aspartate, NMDA, glutamate, tyrosine