This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Structure and function of protein, Subject name: Biochemistry
A glycoprotein that regulates folding of proteins that are expoed from the cell is 
Select and explain. 
A. Mucins, B. Transferrin, C. Calnexin, D. Lectin
C: Calnexin
Answer: C: Calnexin 
Explanation: Glycoproteins Calnexin and Calreticulin regulate folding of proteins that are expoed from the cellRef: Harper&;s biochemistry; 30th edition; Chapter 46; Glycoproteins