The neutrophil respiratory burst oxidase (NADPH-oxidase) generates superoxide and secondary oxygen-derived toxic products in response to bacteria or a variety of soluble stimuli. The active site of this enzyme is located in an integral membrane cytochrome, b558, that consists of the two subunits gp91 [phox] and p21 [phox]. Superoxide production depends on the formation of a complex that includes p67 [phox], p47 [phox], and the GTP-binding protein Rac. Upon activation, these proteins translocate from the cytosol to the membrane where they assemble with b558 and induce oxidase activity. p67 [phox] contains two SH3 domains and binds, via its C-terminal SH3 domain, to the proline rich region of p47 [phox]. This binding allows p67 [phox] to indirectly associate with the oxidase. It is thought that the phosphorylated forms of p67 [phox] and p47 [phox] interact and that the phosphorylation of p67 [phox] is regulated by both PKC-dependent and independent pathways. Although the role of p67 [phox] in electron flow control is poorly understood, it is thought that it regulates the transfer of electrons from NADPH to reduce flavin.
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注意事项：
1.Since applications vary, each investigator should titrate the reagent to obtain optimal results.
2.Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
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