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	
4.4.1.20	membrane	associated with	16020	644498	
4.4.1.20	membrane	bound to	16020	644489	
4.4.1.20	membrane	in close association with 5-lipoxygenase activating protein	16020	666717	
4.4.1.20	membrane	is localized to the outer nuclear membrane, is associated with 5-lipoxygenase activating protein and 5-lipoxygenase. Exclusion from the inner nuclear membrane	16020	709128	
4.4.1.20	membrane	the enzyme is chiefly membrane-bound, although the cytosol contains some activity	16020	644502	
4.4.1.20	microsome	-	-	644486, 644490, 644491, 644492, 644496, 644497, 644503, 644505, 644506, 644507, 695266, 748662	
4.4.1.20	microsome	70% of the activity	-	644500	
4.4.1.20	nuclear envelope	-	5635	681027	
4.4.1.20	nuclear envelope	the active site of leukotriene A4 synthase is localized in the lumen of the nucear envelope and endoplasmic reticulum	5635	644491	
4.4.1.20	nuclear membrane	-	31965	664161	
4.4.1.20	nuclear outer membrane	-	5640	644491	
4.4.1.20	nucleus	-	5634	709128	
4.4.1.20	nucleus	5-lipoxygenase activating protein- and LTC4S-fusion proteins co-localize at the nuclear envelope	5634	702043	
4.4.1.20	nucleus	a nuclear membrane enzyme	5634	730555	
4.4.1.20	particle-bound	-	-	644509	
4.4.1.20	perinuclear space	-	-	644486