4681
In the present study , we generated transgenic mice in which enhanced green fluorescence protein was expressed under the control of a fetal Leydig cell - specific enhancer of the Ad4BP / SF - 1 ( Nr5a1 ) gene .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None