PSEN1 and Alzheimer disease: In this study, we compared AD mutant hiPSC‐neurons expressing heterozygous presenilin 1 (PSEN)1‐mutant (M146V/WT) to an associated isogenic (WT/WT) control.[18, 19] We successfully collected data on 140 excitatory hiPSC‐neurons (AD = 57 and WT = 73), and were able to detect 2251 different proteins in these cells (Table S1, Supporting Information).