[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=C][C][=Branch2][Ring1][=Branch1][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][C][=Branch1][C][=C][C][N][Branch1][C][C][C][C]"}, {"from": "gpt", "value": "Pegylated L-asparagine amidohydrolase from E. coli. Pegylation substantially (by a factor of 4) extends the protein half life."}]