Nature 440, 528–534 (2006)

During editing to meet Nature’s limits on length, we removed a reference to an earlier paper1 reporting that the prolyl isomerase Pin1 promotes production of Alzheimer’s amyloid-β (Aβ) from β-cleaved amyloid precursor protein (APP). That paper reported that Pin1 did not bind to full-length APP, but rather to the phosphorylated Thr 668–Pro motif of the carboxy-terminal C99 fragment of APP; Aβ production in Pin1-knockout mice was reduced only from this fragment.