Which Enzymes Are NOT Involved in Moving Phospholipids from One

question 27

Multiple Choice

Which enzymes are NOT involved in moving phospholipids from one leaflet to another?

• A) flippases that move phosphatidylethanolamine and phosphatidylserine
• B) floppases that move phospholipids from the cytosolic leaflet to the extracellular leaflet
• C) flip-floppases that allow phospholipids to move back and forth between the inner and outer leaflets
• D) scramblases that allow phospholipids to move down their concentration gradient
• E) phosphatidylinositol transfer proteins that play a role in lipid signaling

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