The pigment-lipid complexes of the phytopathogen, Xanthomonas juglandis, were studied. Experiments were designed to determine the cellular location of the complexes and whether or not they are associated with protein.

Separation of the pigment-lipid esters of Xanthomonas juglandis (campestris) in a silica gel G:celite 545 column yielded 4 bands. Two of these bands, ester #1 and #2, make up over 95% of the mixture. Analysis of the four pigments indicate that three are phospholipids and that the phosphate accounts for about 3-4% of the weight of each of the two major esters.