#$%^&*AU2011257764B220120405.pdf#####ABSTRACT The present invention relates to genetically modified proteins with uricolytic activity. More specifically, the inventions relates to proteins comprising truncated urate oxidases and methods for producing them, including PEGylated proteins comprising truncated urate oxidases.1/8 (HaeII) 1 NdeI 113 AlwN Ill Ir s d l origin pigKS-AN Apal NdeI pOUR-P- A N-ks-1 mcs pe ba) 1045 AatlI I 10 (MscI/ScaL) 2629 TetR Figure 1.