28482
However , the orientation of alpha - helix and random coil improved progressively with increasing strain , with a parallel decrease in alpha - helix content and an increase in random coil .
 None
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:  
Answer:
 None