15018
Intriguingly , the capability of Pb to activate ERK was abolished under siAPE1 or E3330 co - treatments ; conversely , forced expression of APE1 up - regulated the ERK activation by Pb or serum in both Cys65 - redox activity dependent and independent manners .
 Chemical: Pb; Chemical: Pb; Chemical: Cys65
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: Pb; Chemical: Pb; Chemical: Cys65