1604
Compared with normal nerve , dystrophic nerve displayed 4 - fold less AChE - T mRNA , 3 - fold more BuChE mRNA and 2 . 5 - fold less PRiMA mRNA , which agreed with the lower AChE activity in dystrophic nerve , its increased BuChE activity and the specific drop in PRiMA - linked BuChE .
 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