challenge: What is functionally equivalent to ACAT in yeast?
  
  A. Acyl-CoA binding protein (ACBP)
  B. Sterol O-acyltransferase (SOAT)
  C. Long-chain fatty acyl-CoA (LCFA-CoA)
  D. Acyl-CoA:sterol acyltransferase (ASAT)
  Answer: 