6876
Following activation of protein kinase A , both the alpha 3 - dependent current and restoration of dendritic [ Na ( + ) ] ( i ) were significantly attenuated , indicating that alpha 3 is a target for phosphorylation and may participate in short term regulation of neuronal function .
 Na ( + )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Na ( + )