The following information accompanied stocks donated to the Bloomington Drosophila Stock Center by Carol Singh and Matt Mahoney of Vitruvean, Inc. P{UAS-PSEN1.VTR} consists of I-467 isoform of human Presenilin 1 (PSEN1) under the control of UAS in the P{UAST} vector (FBmc0000383). P{UAS-PSEN1.M146V.Exel} was made by Exelixis, Inc and consists of human Presenilin 1 (PSEN1) carrying the familial Alzheimer’s mutation M146V under the control of UAS in the P{Express-UAS} vector (FBtp0012992). P{UAS-PSEN1.M146V.Exel}4 is a homozygous viable and fertile insertion on the second chromosome. P{UAS-PSEN1.P267S.Exel} was made by Exelixis, Inc and consists of human Presenilin 1 (PSEN1) carrying the familial Alzheimer’s mutation P267S under the control of UAS in the P{Express-UAS} vector (FBtp0012992). P{UAS-PSEN1.P267S.Exel}1 is an insertion on the second chromosome. *H :Submitter: Annette Parks <anlparks@XXXX>