Rubiscolin

The rubiscolins are a group of opioid peptides which 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 mind. These peptides have much in common with the more known gluten exorphins. The rubiscolins' impact on mental health is not yet known.

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There are 2 known rubiscolins with known structure:

Rubiscolin-5

• Structure: H-Gly-Tyr-Tyr-Pro-OH
• Chemical formula: C₃₀H₄₅N₅O₉
• Molecular weight: 619.70 g/mol

Rubiscolin-6

• Structure: H-Gly-Tyr-Tyr-Pro-Thr-OH
• Chemical formula: C₃₉H₅₄N₆O₁₀
• Molecular weight: 766.87 g/mol