What is "rubiscolin"

n. (context biochemistry English) Any of a group of opioid peptides formed during digestion of the rubisco protein from spinach leaf.

The rubiscolins are a group of opioid peptides that are formed during digestion of the ribulose bisphosphate carboxylase/oxygenase ( Rubisco) protein from spinach leaves. Rubiscolins mimic the effects of opiates and, therefore, influence the brain. These peptides have much in common with the better-known gluten exorphins.

There are 2 known rubiscolins with known structure: