glutathione levels in breast cancer cells Catabolism of extracellular supplies cysteine to support tumours Glutathione and Thioredoxin Antioxidant Pathways

Interestingly, in one study, stress signaling transcripts strongly reacted to a single excess light trigger at 1000 mol m 2 s 1 photon flux density in non-primed Arabidopsis plants, while the same transcripts in primed plants (repeatedly pre-treated with excess light at 1000 mol m 2 s 1 ) remained largely unaffected

Semin Cell Dev Biol 98:3443 Mats JM, Segura JA, Alonso FJ, Mrquez J (2008) Intracellular redox status and oxidative stress: implications for cell proliferation, apoptosis, and carcinogenesis

Malamy JE, Benfey PN (1997) Organization and cell differentiation in lateral roots of Arabidopsis thaliana

10.1089/ars.2006.8.813 Antioxid Redox Signal

In addition, traditionally it was thought that Met synthesis in plants requires transport of homocysteine from plastids to the cytoplasm, as the activity of the last enzyme of the biosynthetic pathway, MS, was found in this compartment only (Wallsgrove et al., 1983