Similar to how GLP-1s (glucagon-like peptide-1 agonists), such as Ozempic, suppress appetite and trigger weight loss, peptides can signal other functions, like the release of growth hormones
Plant Cell 21:34503458 Gao X, Yuan HM, Hu YQ, Li J, Lu YT (2014) Mutation of Arabidopsis CATALASE2 results in hyponastic leaves by changes of auxin levels
As you can see on the far right, the agonist is bound to the receptor, however, this does not result in the channel opening
Low levels of Glutathione (GSH) could be one of the major causes of the excessive inflammatory response (inflammatory storm) linked to severe COVID-19 symptoms of the lungs and even indicate that focusing on increasing body GSH could reduce the number of symptomatic patients