Complex sentence: An oxalate degrading enzyme is a catalytic degradation of oxalic acid polymer protein, including oxalic acid oxidase, oxalic acid decarboxylase and formyl-CoA decarboxylase.
Split into simpler sentences: An oxalate degrading enzyme is a type of enzyme that catalyzes the degradation of oxalic acid polymer protein. Enzymes in this class include oxalic acid oxidase, oxalic acid decarboxylase and formyl-CoA decarboxylase.