ethylene metabolic process ethylene biosynthetic process https://github.com/geneontology/go-ontology/issues/31634 MetaCyc:ETHYL-PWY GO:0042456 ethylene biosynthetic process from L-methionine ethylene anabolism MetaCyc:PWY-6853 MetaCyc:PWY-6854 The chemical reactions and pathways resulting in the formation of ethylene (C2-H4, ethene), a simple hydrocarbon gas that can function in plants as a growth regulator. ethene biosynthetic process from L-methionine ethene biosynthesis from L-methionine GO:0009693 ethylene formation ethylene synthesis ethene biosynthesis biological_process ethylene biosynthesis from L-methionine ethylene biosynthesis ethene biosynthetic process alkene biosynthetic process