3169
beta - Adrenergic agonists mediate enhancement of beta 1 - adrenergic receptor N - terminal cleavage and stabilization in vivo and in vitro .
 Chemical: N
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