Upper HN    GLU-  56 - HA    GLU-  56   2.65   1   0.10   0.20                     *
    Upper HN    LEU   90 - HB3   LEU   90   3.11   2   0.06   0.34               *     +
    Upper HN    LEU   90 - HB2   LEU   90   3.11   3   0.06   0.35             ++      *
    Upper HN    LYS+  55 - HB2   LYS+  55   3.30   1   0.01   0.24                     *
    Cutoffs: Upper distance limits  :    0.20 A