Comparison of the significances of some mechanisms involved in transport of calcium, sodium, and potassium ions, and their consequences on the action potential along the three stages analyzed (Younger, Elder, and MCI Groups)

FunctionalityYoungerElderMCI
Cellular response to Ca2+ ion4.414.230
Ca2+ ion transport15.064.192.72
Voltage-gated Ca2+ channels (VGCCs)3.1201.97
Ca2+ channel complex3.581.461.71
Ca2+ & Calmodulin-dependent protein kinase complex001.69
Na+ transmembrane transport3.2100
Voltage-gated Na+ channels (VGSCs)1.9700
K+ transmembrane transport2.552.500
K+: H+ exchanger ATPase1.581.800
Ranvier nodes3.2000
Action potential9.434.123.48
Excitatory post-synaptic potential4.413.001.96
Membrane depolarization3.6501.33
Membrane hyperpolarization1.6700

The significance is expressed as –log10 (FDR), where FDR is the false discovery rate. Note that a zero value denotes a non-significant functionality, as FDR = 1 (For details of the genes involved, see Tables S1S3)