It is intended to provide a human amyloid .beta. peptide (hereinafter referr ed to as A.beta.) antibody which binds to A.beta. and inhibits the aggregation of A.beta. molecules, and its antibody fragment. The above-described antibody o r its antibody fragment has the variable region of human anti-A.beta. antibody and strongly reacts with A.beta. to thereby exert an effect of inhibiting th e aggregation thereof. The above antibody and its antibody fragment are usable as A.beta. detection reagents, preventives/remedies for Alzheimer~s disease or diagnostics therefor.
HUMAN ANTIAMYLOID BETA PEPTIDE ANTIBODY AND ANTIBODY FRAGMENT THEREOF