Ac-Tyr-OEt	Nα-acetyl-l-tyrosine ethyl ester
Bz-Arg-OEt	Nα-benzoyl-l-arginine ethyl ester
Bz-Arg-pNA	Nα-benzoyl-d,l-arginine-4-nitroanilide
ESI	electrospray ionization
IUPAC	International Union of Pure and Applied Chemistry
MALDI	matrix-assisted laser desorption/ionization
MS	mass spectrometry
MS/MS	tandem mass spectrometry
NPGB	p-nitrophenyl-p′-guanidinobenzoate
nLC	nanoflow liquid chromatography
PDB	Protein Data Bank
SE-Sephadex	Sulfoethyl-Sephadex
TLCK	Nα-p-tosyl-l-lysine-chloromethyl ketone
TOF	time-of-flight
TPCK	N-p-tosyl-l-phenylalanine chloromethyl ketone