****************************************************************************
File name: 3px7.pdb
    no. of DNA/RNA chains: 2 [B=2,C=7]
    no. of nucleotides:    9
    no. of atoms:          4726
    no. of waters:         140
    no. of metals:         3 [Hg=3]

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List of 3 base stacks
  Note: A stack is an ordered list of nucleotides assembled together via
        base-stacking interactions, regardless of backbone connectivity.
        Stacking interactions within a stem are *not* included.
   1 nts=2 RT A.ARG70,C.DT3
   2 nts=2 YG A.TYR177,C.DG4
   3 nts=6 RGCTTT A.ARG169,C.DG6,C.DC7,C.DT8,B.DT1,B.DT2

****************************************************************************
Nucleotides not involved in stacking interactions
     nts=1 A C.DA2

****************************************************************************
List of 2 non-loop single-stranded segments
   1 nts=2 TT B.DT1,B.DT2
   2 nts=7 ATGCGCT C.DA2,C.DT3,C.DG4,C.DC5,C.DG6,C.DC7,C.DT8

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Secondary structures in dot-bracket notation (dbn) as a whole and per chain
>3px7 nts=9 [whole]
TT&ATGCGCT
..&.......
>3px7-B #1 nts=2 [chain] DNA
TT
..
>3px7-C #2 nts=7 4.23(0.55) [chain] DNA
ATGCGCT
.......

****************************************************************************
Summary of structural features of 9 nucleotides
  Note: the first five columns are: (1) serial number, (2) one-letter
    shorthand name, (3) dbn, (4) id string, (5) rmsd (~zero) of base
    ring atoms fitted against those in a standard base reference
    frame. The sixth (last) column contains a comma-separated list of
    features whose meanings are mostly self-explanatory, except for:
      turn: angle C1'(i-1)--C1'(i)--C1'(i+1) < 90 degrees
      break: no backbone linkage between O3'(i-1) and P(i)
   1  T . B.DT1    0.006  ~C2'-endo,BI,non-pair-contact,ss-non-loop
   2  T . B.DT2    0.006  anti,~C2'-endo,non-pair-contact,ss-non-loop,phosphate
   3  A . C.DA2    0.003  anti,~C2'-endo,non-stack,ss-non-loop
   4  T . C.DT3    0.004  anti,~C2'-endo,non-pair-contact,ss-non-loop
   5  G . C.DG4    0.007  non-pair-contact,ss-non-loop
   6  C . C.DC5    0.002  anti,~C3'-endo,BI,non-pair-contact,ss-non-loop,phosphate
   7  G . C.DG6    0.010  anti,~C2'-endo,BI,non-pair-contact,ss-non-loop,phosphate
   8  C . C.DC7    0.006  anti,~C2'-endo,BI,non-pair-contact,ss-non-loop,phosphate
   9  T . C.DT8    0.004  anti,~C2'-endo,non-pair-contact,ss-non-loop,phosphate

****************************************************************************
List of 9 additional files
   1 dssr-2ndstrs.bpseq -- secondary structure in bpseq format
   2 dssr-2ndstrs.ct -- secondary structure in connectivity table format
   3 dssr-2ndstrs.dbn -- secondary structure in dot-bracket notation
   4 dssr-torsions.txt -- backbone torsion angles and suite names
   5 dssr-stacks.pdb -- an ensemble of base stacks
   6 dssr-rotmat.txt -- position vector and rotation matrix
   7 dssr-viewV.pdb -- vertical view of the principal moment of inertia
   8 dssr-viewH.pdb -- horizontal view of the principal moment of inertia
   9 dssr-viewT.pdb -- top view of the principal moment of inertia