An internal standard for amino acid analyses: S-beta-(4-pyridylethyl)-L-cysteine.
D000596:Amino Acids / Q000592:standards*; D003545:Cysteine / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D007259:Infrared Rays; D009682:Magnetic Resonance Spectroscopy; D008722:Methods; D013057:Spectrum Analysis
D000596:Amino Acids; D003545:Cysteine