7994
Second , the membrane expression of alpha and beta subunits was mimicked by cholesterol and 17 - ketocholesterol , both of which inhibit HMG - CoA reductase .
 HMG - CoA reductase
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 HMG - CoA reductase