Chromosome 1 (AD4)

A region on Chromosome 1 that encodes for a gene, had been found to be common among AD affected people who descended from Germans who lived in Russia near the Volga River. The gene involved is presenilin II (E5.1, STM2). This inherited form strikes between the ages of 50 and 70 and shows many similarities with chromosome 14. This is still considered another rare mutation.

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