4.4.1.20	axon	emanating from the vasopressinergic magnocellular neurons of the hypothalamic paraventricular, supraoptic and suprachiasmatic nuclei as well as the retrochiasmatic area to the pars nervosa of the pituitary gland. It is also observed in the axons of the extrahypothalamic system	30424	666465	
4.4.1.20	cytosol	22% of the activity	5829	644500	
4.4.1.20	cytosol	the enzyme is chiefly membrane-bound, although the cytosol contains some activity	5829	644502	
4.4.1.20	endoplasmic reticulum	-	5783	664161	
4.4.1.20	endoplasmic reticulum	5-lipoxygenase activating protein- and LTC4S-fusion proteins co-localize	5783	702043	
4.4.1.20	endoplasmic reticulum	the active site of leukotriene A4 synthase is localized in the lumen of the endoplasmic reticulum	5783	644491	
4.4.1.20	endoplasmic reticulum membrane	-	5789	681027	
4.4.1.20	endoplasmic reticulum membrane	integral membrane protein in the outer leaflet of the nuclear envelope and in the endoplasmic reticulum	5789	730061, 730788	
4.4.1.20	membrane	-	16020	644485, 644491, 644493, 644497, 666794, 666938, 748662	
4.4.1.20	membrane	a nuclear membrane enzyme	16020	730555