2.2 SQUARE inside PROTEIN p0 inside PROTEIN p1 inside SIMPLE_MOLECULE Ethylene inside SIMPLE_MOLECULE Ethylene_space_oxide inside SIMPLE_MOLECULE Acetylene inside SIMPLE_MOLECULE Acetyl_minus_CoA STATE_TRANSITION Ethylene_space_oxide Acetyl_minus_CoA c1 c3 STATE_TRANSITION Acetylene Ethylene c2 c0