File:Oxytocin.jpg

Illustration from Crystal structure analysis of deamino-oxytocin: conformational flexibility and receptor binding showing the oxytocin neuropeptide. The inset shows oxytocin bound to a carrier protein, neurophysin from Bovine Neurophysin II Complex With Oxytocin.

Source: Images from the Protein Data Bank (PDB).

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from en:Image:Oxytocin.jpg, originally uploaded by en:User:JWSchmidt