1742
The effect of nitric oxide synthase inhibitor on reperfusion injury of the brain under hypothermic circulatory arrest .
 GENE: nitric oxide synthase
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: nitric oxide synthase 
Answer:
 GENE: nitric oxide synthase