The lower number is the number of distinct residues which were found to fit within 3 in the best-fit procedure. Our program adaptively fits the query and target proteins with the sequence numbers increasing within the given window (90 residues in this case) and within the specified tolerance (3 in this case). 4pmh is RW PME, 3grh is the YbhC lipoprotein from E. coli (Eklf et al., 2009 ▶), 1gq8 is the PME from carrot (Daucus carota; Johansson et al., 2002 ▶), 1xg2 is the PME from tomato (Solanum lycopersicum; Di Matteo et al., 2005 ▶), 1qjv is the PME from D. dadantii (Jenkins et al., 2001 ▶) and 3uw0 is the PME from Yersinia enterocolitica (Boraston Abbott, 2012 ▶).