AEM	Anion exchange membrane
AP	Anionic peptides
A−RC	Anionic peptide recovery compartment
CEM	Cation exchange membrane
CP	Cationic peptides
C+RC	Cationic peptide recovery compartment
Da	Dalton
ED	Electrodialysis
EDFM	Electrodialysis with filtration membranes
FM	Filtration membrane
kDa	Kilo Dalton
MW	Molecular weight
MWCO	Molecular weight cut-off
mS	Milli-Siemens (electrical conductivity unit)
PES	Polyether sulfone
PSD	Pore size distribution
PVDF	Polyvinylidene fluoride
RA	Relative abundance
UPLC-MS-QTOF	Ultra-high-performance liquid chromatography-mass spectrometry-quadrupole time-of-flight
WPI	Whey protein isolate
ZP	Zeta potential