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. Author manuscript; available in PMC: 2009 Jun 3.
Published in final edited form as: Genet Med. 2008 Apr;10(4):231–239. doi: 10.1097/GIM.0b013e31816b64dc

Table 3. Early-Onset Familial Alzheimer Disease (EOFAD): Molecular Genetics.

Locus Name Proportion of EOFAD Gene Symbol Chromosomal Locus Protein Name Test Availability
AD3 20%-70% PSEN1 14q24.3 Presenilin-1 Clinical
AD1 10%-15% APP 21q21 Amyloid beta A4 protein Clinical
AD4 Rare PSEN2 1q31-q42 Presenilin-2 Clinical