21430
Further analyses revealed that CdTe - QD exposure resulted in apoptosis , indicated by changes in levels of caspase - 3 activity , poly ADP - ribose polymerase ( PARP ) cleavage and phosphatidylserine externalization .
 Chemical: CdTe; Chemical: poly ADP - ribose; Chemical: phosphatidylserine
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: CdTe; Chemical: poly ADP - ribose; Chemical: phosphatidylserine