16837
In this study , we identified the functional role of cobrotoxin , the short - chain alpha - neurotoxin isolated from Naja atra venom , which acts in the regulation of the transient A - type K ( + ) currents ( IA ) and membrane excitability in dorsal root ganglion ( DRG ) neurons via the activation of the muscarinic M3 receptor ( M3R ) .
 Chemical: K ( + )
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: K ( + )