29148
Proline either breaks or kinks a helix , both because it cannot donate an amide hydrogen bond ( having no amide hydrogen ) , and also because its sidechain interferes sterically with the backbone of the preceding turn inside a helix , this forces a bend of about 30 ° in the helix 's axis .
 person: Proline
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Proline 
Answer:
 person: Proline