4-PA | 4-pyridoxic acid |
FMN | flavin mononucleotide |
FAD | flavin adenine dinucleotide |
LQ | lower quartile |
NAD | nicotinamide adenine dinucleotide |
NADP | nicotinamide adenine dinucleotide phosphate |
PLP | pyridoxal 5′-phosphate |
PL | pyridoxal |
PPO | pyridoxine phosphate oxidase |
UHPLC/MS-MS | ultra-high-performance liquid chromatography/tandem mass spectrometry |
UQ | upper quartile |