15172
Cis - trans isomerizations of proline residues are key to bradykinin conformations .
 Chemical: proline; Chemical: bradykinin
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: proline, bradykinin 
Answer:
 Chemical: proline; Chemical: bradykinin