29761
Mitochondria in the steroidogenic cells of the adrenal , gonad , placenta and brain contain the cholesterol side - chain cleavage enzyme , P450scc , and its two electron - transfer partners , ferredoxin reductase and ferredoxin .
 cholesterol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 cholesterol