Enzymatic Isomerization

Enzymatic isomerization refers to the biochemical process by which cannabis plant enzymes rearrange the molecular structure of terpenes and cannabinoids without changing their chemical formula. This transformation occurs naturally during plant growth, post-harvest curing, and storage, particularly when heat, light, or specific enzyme activity is present. In cannabis breeding and preservation, understanding isomerization is critical because it can alter the cannabinoid and terpene profile of a cultivar over time. For example, THCA may isomerize to THC through decarboxylation, while certain monoterpenes may convert to their structural isomers, affecting both potency markers and aroma compounds. Breeders and seed banks track this process to maintain genetic stability and predict how a strain's chemical profile will evolve.

Breeders monitor enzymatic isomerization to predict how stored seeds and cured flower will age. Understanding these enzymatic pathways helps establish preservation protocols that slow unwanted isomerization and maintain intended cannabinoid and terpene ratios across generations.