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Modulation of 25 - hydroxyvitamin D3 - 24 - hydroxylase by aminophylline : a cytochrome P - 450 monooxygenase system .
 25 - hydroxyvitamin D3 - 24 - hydroxylase, cytochrome P - 450 monooxygenase
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 25 - hydroxyvitamin D3 - 24 - hydroxylase, cytochrome P - 450 monooxygenase