15088
Cellular protein labeling occurs only upon activation of two different promoters that drive expression of the N - and C - terminal fragments of the bisected MetRS .
 Chemical: N; Chemical: C
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: N; Chemical: C