The subcellular distribution and some properties of the cytochrome b component of the microbicidal oxidase system of human neutrophils

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Abstract
A novel cytochrome b has recently been described in human neutrophils. The subcellular distribution of this cytochrome was investigated by analytical fractionation on continuous sucrose gradients and it was found to have a dual localization, the major component having a similar distribution to the plasma-membrane marker [3H]concanavalin A, and a denser peak located with the specific granules. The 2 components were separated on discontinuous gradients and studied independently.