7984
An important effector of the ISR is activating transcription factor 4 ( ATF4 ) , a transcription factor that regulates genes involved in redox homeostasis and amino acid metabolism and transport .
 Chemical: amino acid
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: amino acid