ATP7B and Alzheimer disease: Squitti R. et al. (2013) [13] investigated the role of the ATP7B gene in copper dyshomeostasis associated with AD, measuring serum levels of ceruloplasmin, copper, and free copper, and evaluating their association with certain single nucleotide polymorphisms (SNPs)—such as rs1801243, rs2147363, rs1061472, and rs732774—of the ATP7B gene.