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

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

A significant decrease in plasma Hcy was observed for the DCr (75 (sd 12) mol/l) and CrO+D (72 (sd 17) mol/l) groups compared with the control group (124 (sd 22) mol/l)

It can also be used to count antral follicles, also known as resting follicles, in the ovaries