For example, the molecule CH 2 = CH CH 2 CH = CH 2 ( 1, 4-pentadiene ) is homoconjugated because the two C = C double bonds ( which are ?-systems because each double bond contains one ? bond ) are separated by one CH 2 group.
12.
"' Lipoxygenases "'( ) are a family of ( non-heme ), iron-containing enzymes most of which catalyze the dioxygenation of polyunsaturated fatty acids in lipids containing a cis, cis-1, 4-pentadiene into cell signaling agents that serve diverse roles as autocrine signals that regulate the function of their parent cells, paracrine signals that regulate the function of nearby cells, and endocrine signals that regulate the function of distant cells.
