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J Bacteriol. 1963 November; 86(5): 1070-1074
Copyright © 1963, The Williams & Wilkins Company. All Rights Reserved.

LOCALIZATION OF CAROTENOID PIGMENT IN THE CYTOPLASMIC MEMBRANE OF XANTHOMONAS JUGLANDIS

^a Department of Bacteriology, University of California, Davis, California

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.

¹ Present address: Department of Biology, Chico State College, Chico, Calif.

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