Key for Scholl_NodL sequence alignments: gi|2494018 - Escherichia coli gi|1561556 - Bacillus halodurans gi|586845| - Bacillus subtilis gi|128479| - Sinorhizobium meliloti gi|128478| - Rhizobium leguminosarum rk11c02.y1 - Meloidogyne javanica EST MI01045 - Meloidogyne incognita cluster gi|1347246 - Mesorhizobium loti gi|1588765 - Agrobacterium tumefaciens gi|1449502 - Streptomyces coelicolor gi|6322243 - Saccharomyces cerevisiae gi|1514602 - Lactobacillus delbrueckii gi|1657538 - Escherichia coli gi|1589595 - Clostridium acetobutylicum Both alignments are in PHYLIP format. The first, gb-2003-4-6-R39-s10.phy, is the alignment used to calculate the tree, using PHYLIP's ProtDist and Neighbor Joining, as described in the "Materials and Methods" section of the manuscript. The second, gb-2003-4-6-R39-s11.phy is the alignment of the original sequences, before any manual adjustments were made. The key is a "translation" of the gi number listed in the alignment to the species as noted in the phylogeny in figure 2. Please note that in PHYLIP's ProtDist program, gaps are treated as unknown and affect only pariwise distance calculations for the sequence containing the gap.