Apolipoprotein E/ApoE3 is an apolipoprotein isoform that mediates lipid transport and plays a crucial role in lipid homeostasis in both plasma and the central nervous system by binding to LDL receptors (LDLR), LDL receptor-related proteins (LRP1, LRP2, LRP8), Very Low-Density Lipoprotein Receptor (VLDLR), and Heparin. The Apolipoprotein E/ApoE3 Protein, Human (HEK293, His) is a recombinant protein with a His tag at the N-terminus, consisting of 299 amino acids (K19-H317), and is expressed in HEK293 cells[1].