hydrocarbon degradation alkene degradation UPa:UPA00775 pathway GO:0043451 olefin degradation Degradation of alkene compounds, unsaturated hydrcarbons containing at least one carbon-to-carbon double bond. Some bacteria, such as Xanthobacter autotrophicus Py2 and Rhodococcus rhodochrous, are capable of aerobic growth using aliphatic alkenes (such as ethylene, propylene and butylene) as source of carbon and energy. alkene metabolism