surround

The polyethylene glycol groups protect the peptide but don't surround it completely.	Les groupes polyéthylène glycol protègent le peptide mais ne l'entourent pas complètement.
The polyethylene glycol groups protect the peptide but don't surround it completely.	Les groupes de polyéthylène glycol protègent le peptide mais ne l'entourent pas complètement.

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