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

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 two components were separated on discontinuous gradients and studied independently.