Bound by a single membrane, they contain type II oxidases like urate oxidase, whose action produces the compound for which it is named.  
These organelles are particularly abundant in renal proximal convoluted tubule cells and liver parenchyma cells.  Bound by a single membrane, they contain type II oxidases like urate oxidase, whose action produces the compound for which it is named.  A predominant constituent is the enzyme catalase, which helps in the process of detoxification for which this organelle is known.  FTP, what is this organelle named for the presence of the compound H2O2?
These organelles are particularly abundant in renal proximal convoluted tubule cells and liver parenchyma cells.  
peroxisomes