ACC oxidase (ACO)
is an important enzyme for the control of ethylene production.
Ethylene perception is by the target cells through receptors
(ETRs), which act as negative regulators of the ethylene
response pathway. The signal transduction cascade involves
both positive and negative regulators (CTR, EIN2, EIN3
etc.) and regulation of target gene expression by transcriptionfactors such as ethylene response factors (ERFs)