FXYD5 and Alzheimer disease: Of all 505 SNPs (154 loci) not in the APOE locus in AD, NAD, and AD&NAD groups, one locus harboring FXYD5 and FAM187B genes (11 SNPs, NAD group) was on chromosome 19, and the other 494 SNPs (153 loci) were not on chromosome 19.