Presenilin 2 familial Alzheimer's disease mutations result in partial loss of function and dramatic changes in Abeta 42/40 ratios

Gene knockout studies in mice suggest that presenilin 1 (PS1) is the major gamma-secretase and that it contributes disproportionately to amyloid beta (Abeta) peptide generation from beta-amyloid precursor protein (APP), whereas PS2 plays a more minor role. Based on this and other observations we hyp...

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