is glutathione a protein What Agarose? – GoldBio Redox Regulation by Protein S-Glutathionylation:

Batch: GF-GLUTA600-B241 Assay Content: 580 mg Purity: greater than 99.8 percent Identification by FTIR Spectrum: 1000 Identification by Retention Time: 0.985 Molecular Ion Mass Identification: 307 Da Bacterial Endotoxins: below 0.001 EU/mg Total Aerobic Microbial Count: 0 CFU/g Total Yeast and Mold Count: 0 CFU/g Independent elemental impurity analysis confirmed no detectable arsenic, cadmium, cobalt, lead, mercury, nickel or vanadium, with all measured concentrations remaining below the laboratory detection limit

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Podgrska, A., Pucion-Jakubik, A., Markiewicz-ukowska, R., Gromkowska-Kpka, K.J

The results indicate that p53 TAD PEP bound effectively to FOXO4 FHD, with a K d of 0.11 M (Figure