R5

CH,0H

CH,0H

FIGURE 14.5 General structure of the nod factors produced by rhizobia. The presence of sub-stituents numbered R1-R9 is variable among strains of rhizobia. See Table 14.9 for examples of these substituents. In the absence of substituents, R groups stand for hydrogen (R1), hydroxy (R2, R3, R4, R5, R6, R8, and R9), and acetyl (R7). Courtesy of H. Spaink; used by permission.

FIGURE 14.5 General structure of the nod factors produced by rhizobia. The presence of sub-stituents numbered R1-R9 is variable among strains of rhizobia. See Table 14.9 for examples of these substituents. In the absence of substituents, R groups stand for hydrogen (R1), hydroxy (R2, R3, R4, R5, R6, R8, and R9), and acetyl (R7). Courtesy of H. Spaink; used by permission.

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