Supplier Page from Aladdin Scientific Corporation for Potassium phosphate buffer
4-Nitrophenyl hepta-O-acetyl-1-thio-β-lactoside from Aladdin Scientific Corporation
650 nm Stop Reagent for TMB Microwell Substrates from Aladdin Scientific Corporation
DL-Citrulline from Aladdin Scientific Corporation
Z-Ala-Ala-OH from Aladdin Scientific Corporation