15092
The approach is demonstrated by selective labeling of proteins in bacterial cells immobilized in the center of a laminar - flow microfluidic channel , where they are exposed to overlapping , opposed gradients of inducers of the N - and C - terminal MetRS fragments .
 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