LOCALIZATION OF CAROTENOID PIGMENT IN THE CYTOPLASMIC MEMBRANE OF XANTHOMONAS JUGLANDIS

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Abstract
Stephens, William L. (University of California, Davis), and Mortimer P. Starr . Localization of carotenoid pigment in the cytoplasmic membrane of Xanthomonas juglandis . J. Bacteriol. 86: 1070–1074. 1963.—The kinetics of release of carotenoid pigment from cells of Xanthomonas juglandis , disrupted by sonic or ballistic treatment, showed the pigment to be localized in the cell envelope. Cells subjected to ballistic disintegration released carotenoid at a rate identical to that of a membrane component (reduced nicotinamide adenine dinucleotide oxidase) and at a slightly higher rate than a wall component (hexosamine). Thus, the membrane portion of the cell envelope is the most probable locus of the unique carotenoid pigment of X. juglandis .