3346
Nicotinic receptor antagonists mecamylamine ( 0 . 5 and 1 mg / kg ) and hexamethonium ( 5 and 10 mg / kg ) reduced the response induced by nicotine ( 0 . 25 mg / kg ) .
 GENE: Nicotinic receptor
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: Nicotinic receptor