28383
In order to identify the candidate target proteins covalently modified by 15d - PGJ2 in human aortic endothelial cell ( EC ) , EC were treated with biotinylated - 15d - PGJ2 , the modified proteins extracted by Neutravidin affinity - purification and the proteins identified by LTQ Orbitrap mass spectrometer .
 Chemical: 15d - PGJ2; Chemical: biotinylated - 15d - PGJ2
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: 15d - PGJ2; Chemical: biotinylated - 15d - PGJ2