Is there an enzyme that functions without being associated with a complex?

Question

I'm looking for an enzyme that does not function as part of a complex in its active state. Preferably it also is not part of a kinase or other kind of activating cascade as well though I would appreciate any and all names that are not part of a complex in its active state. Also would be better if it does not require post translational modifications. Of course, pre translational modifications/ interactions at rna or dna level are all good. In eukaryotic genome but bonus points for human genome! Thanks!!

Answer 1

The majority of enzymes are proteins with the exception of Ribozyme. All enzymes have an active site.