7231
Previous studies demonstrated that the flavin - containing monooxygenases ( FMO ) are expressed in a tissue - specific manner .
 flavin - containing monooxygenases, FMO
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 flavin - containing monooxygenases, FMO