PLTP (Phospholipid Transfer Protein): PLTP is a protein that plays a crucial role in lipid metabolism and transport within the body. It facilitates the transfer of phospholipids between various lipoprotein particles, helping to regulate their composition and function. PLTP is essential for maintaining plasma lipoprotein balance, affecting the size, composition, and function of HDL and LDL particles, and supporting processes such as reverse cholesterol transport.