cysteine glutathione conjugate - an overview Glutathione-Mediated Conjugation of Anticancer Drugs:
Description
Either way, it is often caused by a deficiency in vitamin B12

Only reduced glutathione (GSH) is actually biologically active

doi: 10.1161/CIRCRESAHA.116.303587 258 ReyPLopez-RealASanchez-IglesiasSMuozASoto-OteroRLabandeira-GarciaJL

[0612] The exquisite tumor specificity of ALPPL2 presents an excellent opportunity to develop a novel ADC with the potential of achieving durable responses in the clinic as a single agent

This is because there is not yet enough evidence to establish an RDA
