5830
This study can help us to understand the mechanisms through which Cu ( 2 + ) participates in the fibrillation of alpha - syn12 peptide at the atomic level , which in turn represents a step towards elucidating the nosogenesis of Parkinson ' s disease .
 Chemical: Cu ( 2 + ); Chemical: alpha - syn12 peptide
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: Cu ( 2 + ), alpha - syn12 peptide 
Answer:
 Chemical: Cu ( 2 + ); Chemical: alpha - syn12 peptide