Fuente: WIPO "tomato" This disclosure concerns a method for the conversion of nepetalactol and/or nepetalactone to dihydronepetalactone catalysed by nepetalactol-related short-chain dehydrogenase enzymes (NEPS) polypeptides from Nepeta mussinii (Nepeta racemosa) and modified NEPS polypeptides with increased activity; and including microbial cells, plant cells and plants transformed to express said modified NEPS polypeptides