Bovine Serum Albumin, Acetylated (Ac-BSA) is a polypeptide with a known structure and strong antigenicity, which produces a significant immune response. It can be utilized as a positive control substance in ELISA or WB experiments and in experiments with acetylated lysine monoclonal or polyclonal antibodies. It also enhances encapsulation efficiency at low concentrations of PLGA, a polymer known for its biocompatibility, degradability, and controlled release properties.