In recent years, in-depth studies have been carried out detailing the irreversible inactivation of general acyl-CoA dehydrogenase enzymes by (methylenecyclopropy1) acetyl CoA (MCPA-CoA, The free carboxylic acid, specifically (R)-(-) MCPA (lb) 3 is the toxic metabolite of hypoglycin-A, an amino acid found in the fruit of the Jamaican ackee tree. Ingestion of the unripe fruit is known to cam Jamaican vomiting sickness, a severe hypoglycemic response ...