- Amine Pegylation
- Carboxyl Pegylation
- Gold SurfacePegylation
- Hydroxyl Pegylation
- Thiol Pegylation
- N-terminal pegylation

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PEG-Succinimidyl Carbonate (PEG-SC)
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PEG-Succinimidyl Succinate (PEG-SS)
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PEG-Succinimidyl Glutarate (PEG-SG)
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PEG-Succinimidyl CarboxyMethyl (PEG-SCM)
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PEG-Succinimidyl Propionate (PEG-SP)
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PEG-Succinimidyl Butanoate (PEG-SB)
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PEG-Nitrophenyl Carbonate (PEG-NPC)
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PEG-Benzotriazoly Carbonate (PEG-BTC)
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PEG-Aldehyde (PEG-ALD)
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PEG-Propionaldehyde (PEG-PAL)
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PEG-Butyraldehyde (PEG-BAL)