704
The de novo - synthesized inositol is believed to be utilized mostly for GPI production because the IMPase that dephosphorylates inositol 3 - phosphate to inositol is localized to the ER , where GPI synthesis occurs .
 ER
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 ER