ABCA2 is a gene that provides instructions for making a protein involved in transporting various molecules across cell membranes. This protein is part of the ATP-binding cassette (ABC) transporter family, which plays a crucial role in moving substances like lipids and drugs in and out of cells. Mutations in the ABCA2 gene can lead to various health issues, including problems with lipid metabolism. Research on ABCA2 is important for understanding its role in conditions such as Alzheimer's disease and other disorders related to lipid transport and metabolism.