1487
In Experiment 1 , pups that had received an injection of the noncompetitive N - methyl - D - aspartate receptor antagonist MK - 801 ( 0 . 1 mg / kg , i . p . ) either 30 min before or immediately after conditioning spent less time over the conditioned odor than saline - treated controls .
 GENE: N - methyl - D - aspartate 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: N - methyl - D - aspartate receptor