16563
In these incubations , the initial rate of MFA - AMP formation was rapid , leveling off at a maximum concentration of 90 . 1 nM ( 20 s ) , while MFA - GSH formation increased linearly , reaching a concentration of 1 . 7 mu M after 60 min of incubation .
 MFA - AMP, MFA - GSH
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 MFA - AMP, MFA - GSH