7680
Incubation of purified Pin1 with HNE followed by MALDI - TOF / TOF mass spectrometry resulted in detection of Michael adducts at the active site residues His - 157 and Cys - 113 .
 Chemical: HNE; Chemical: His; Chemical: Cys
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: HNE; Chemical: His; Chemical: Cys