![](http://www.alamy.com/thumbs/6/E986E454-FC78-4AD3-8956-A956304E28BD/MCFK6H.jpg)
Met-enkephalin endogenous opioid peptide molecule. Stylized 2D renderings.
Size: 5000px × 4783px
Photo credit: © molekuul.be / Alamy / Afripics
License: Royalty Free
Model Released: No
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