4531
Glycogen synthase , a key enzyme in muscle glycogen synthesis , is extensively regulated , both allosterically ( by glucose - 6 - phosphate , ATP , and others ) and covalently ( by phosphorylation ) .
 Chemical: glucose - 6 - phosphate; Chemical: ATP
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: glucose - 6 - phosphate; Chemical: ATP