The present invention relates to the field of diseases, such as Alzheimer's disease, where abnormal brain accumulation of .beta. amyloid and/or amyloid plaques are involved. More specifically, the present invention relates to a non-human animal model for such diseases and its use in screening methods for molecules for treating same.

 
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> Transgenic animals producing low-lactose milk and newly identified human small intestinal extracellular lactase-phlorizin hydrolase (ecLPH) gene

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