5268
Fraction 2 contains 1 , 25 ( OH ) 2 - vitamin D3 , vitamin D3 , 25 ( OH ) - vitamin D3 and 1 , 24 , 25 ( OH ) 3 - vitamin D3 .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None