English: A comparison of uricase (pdb:1uox) and PEG-uricase (model). PEG-uricase includes 40 polymers of 10kDa PEG. PEGylation improves its solubility at physiological pH, increases serum half-life and reduces immunogenicity without compromising activity. Upper images show the whole tetramer, lower images show an example of one of the lysines that is PEGylated. (PEG-uricase model from reference[1], only 36 PEG polymers included)
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↑ (3 January 2008). "PEG-uricase in the management of treatment-resistant gout and hyperuricemia.". Advanced drug delivery reviews60 (1): 59-68. PMID17826865.