776
Sodium channel beta - subunits modulate channel gating , assembly , and cell surface expression in heterologous cell systems .
 Chemical: Sodium
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: Sodium 
Answer:
 Chemical: Sodium