Robuta

https://pubmed.ncbi.nlm.nih.gov/10988298/
A large variety of proenkephalin-A-derived peptides (PEAPs) are present in bovine adrenal medulla secretory granules that are cosecreted with catecholamines...
chromaffin cellsprocessingproenkephalinbovineidentification
https://www.ncbi.nlm.nih.gov/gene/5179
homo sapienshuman genepenkproenkephalinncbi