| gptkbp:instanceOf | gptkb:Endogenous_opioid_peptide gptkb:Neuropeptide
 
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                                | gptkbp:chemicalClass | Polypeptide 
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                                | gptkbp:discoveredBy | gptkb:John_Hughes gptkb:Hans_Kosterlitz
 
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                                | gptkbp:discoveredIn | 1975 
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                                | gptkbp:effect | gptkb:Euphoria Well-being
 Analgesia
 Reduced perception of pain
 
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                                | gptkbp:etymology | Endogenous + morphine 
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                                | gptkbp:firstIsolatedFrom | Pig brain 
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                                | gptkbp:foundIn | gptkb:Central_nervous_system gptkb:Human_body
 Pituitary gland
 
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                                | gptkbp:function | Stress reduction Pain relief
 Immune system modulation
 Induce feelings of pleasure
 
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                                | gptkbp:influenced | gptkb:Sleep Appetite
 Hormone release
 
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                                | gptkbp:involvedIn | gptkb:Stress_response Immune response
 Reward system
 Mood regulation
 Runner's high
 
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                                | gptkbp:producedBy | gptkb:Hypothalamus Pituitary gland
 
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                                | gptkbp:recipient | Delta-opioid receptor Kappa-opioid receptor
 Mu-opioid receptor
 
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                                | gptkbp:relatedTo | Opioid receptors Dynorphin
 Enkephalin
 
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                                | gptkbp:subclassOf | gptkb:neurotransmitter Opioid peptide
 
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                                | gptkbp:subspecies | gptkb:Alpha-endorphin gptkb:Beta-endorphin
 gptkb:Gamma-endorphin
 
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                                | gptkbp:triggeredBy | gptkb:Pain gptkb:exercise
 gptkb:Sexual_activity
 Spicy food
 Laughter
 Excitement
 
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                                | gptkbp:type | Peptide hormone 
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                                | gptkbp:bfsParent | gptkb:NaturalMotion 
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                                | gptkbp:bfsLayer | 7 
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                                | https://www.w3.org/2000/01/rdf-schema#label | Endorphin 
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