
| Source: | Rabbit | Gene Id: | 240 | 
| Isotype: | IgG | Swiss Prot: | P09917 | 
| purity: | Affinity purification | 
| Background: | 
| 5-Lipoxygenase (5-LO, ALOX5) is an important catalytic enzyme responsible for the biosynthesis of leukotriene LTA4 from arachidonic acid (1,2). Leukotriene synthesis also requires 5-lipoxygenase-activating protein (FLAP, ALOX5AP), a nuclear membrane-bound protein that binds arachidonic acid and is thought to activate 5-LO. A number of related leukotrienes (i.e. B4, C4, D4) are derived from LTA4 and together these lipid mediators function in immune reaction regulation. 5-LO is primarily expressed in polymorphonuclear leukocytes, peripheral blood monocytes, macrophages, and mast cells (1,3). Overexpression of 5-LO protein is seen in certain cancer cells and is associated with poor diagnosis (1,4). Depending upon the cell type, 5-LO is localized to either the cytosol or the nucleus of quiescent cells (5). Following stimulation, 5-LO translocates to the nucleus and associates with FLAP to catalyze LTA4 synthesis (2,3). Phosphorylation of specific residues can regulate 5-LO enzymatic activity. Phosphorylation of 5-LO at Ser523 by PKA family kinases inhibits oxygenase activity (6,7) while MAPKAP2 and ERK family kinase phosphorylation at Ser271 and Ser663 stimulates 5-LO enzymatic activity in vivo (8,9). | 
| Reactivity | Human, Mouse, Rat | 
| Tested applications | WB IHC | 
| Clonality | Polyclonal Antibody | 
| Calculated MW | 78 kDa | 
| Recommended Dilutions | WB 1:500-1:2000 IHC 1:50-1:200 | 
| Immunogen | A recombinant protein of human ALOX5 | 
| Storage | Store at -20°C or -80°C in PBS with 0.02% sodium azide and 50% glycerol. Avoid freeze/thaw cycles. | 
| Synonym | 5-LO, 5-LOX, 5LPG, LOG5, MGC163204 | 
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