Supplier Page from Aladdin Scientific Corporation for Citrate buffer
2-Hydroxynicotinaldehyde from Aladdin Scientific Corporation
4-Amino-L-phenylalanine, HCl from Aladdin Scientific Corporation
4-Nitrophenyl phosphate disodium salt hexahydrate from Aladdin Scientific Corporation
Phenyl isothiocyanate from Aladdin Scientific Corporation