väikesed membraaniga ümbritsetud raku organellid, mis kasutavad molekulaarset hapnikku orgaaniliste molekulide (nt rasvhapped, aminohapped) oksüdeerimiseks, mille tulemusel tekib vesinikperoksiidi (H2O2), Small membrane-bound organelles that use molecular oxygen for the breakdown of very long chain fatty acids through beta-oxidation, which are eventually broken down to carbon dioxide and water.