Which lipoprotein is categorized as beta-lipoprotein?

• A. LDL
• B. HDL
• C. VLDL
• D. Chylomicrons

Answer: (A)

Beta-lipoprotein refers to the lipoprotein that migrates to the beta region on electrophoresis, which is the LDL particle. LDL carries most of the cholesterol in plasma and contains apolipoprotein B-100, giving it its characteristic density and role in cholesterol transport. In contrast, HDL moves in the alpha region (alpha-lipoprotein), and VLDL is the pre-beta lipoprotein that migrates before the beta region. Chylomicrons are too large to migrate in this pattern and stay near the origin. So, the lipoprotein categorized as beta-lipoprotein is LDL.