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Images for README.md
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luchini18 committed Dec 1, 2020
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32 changes: 23 additions & 9 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -92,22 +92,33 @@ H 2.03 0.76 -1.25
H 0.76 2.03 -1.25
```

A visualization of these parameters can be shown in the program PyMOL using the two output files created by DBSTEP, showing the L parameter in blue, Bmin parameter in green and Bmax parameter in red.

![Example1](Example1.png)

2. Sterimol2Vec Parameters for Ph

The `--scan` argument is formatted as `rmin:rmax:interval` where rmin is the distance from the center along the L axis to start measurements, rmax dictates when to stop measurements, and interval is the frequency of measurements. In this case the length of the molecule (~6A) is measured in 1.0A intervals

```
>>>python -m dbstep examples/Ph.xyz --sterimol --atom1 2 --atom2 5 --scan 0.0:6.0:1.0
Ph.xyz / R: 0.00 / Bmin: 1.65 / Bmax: 3.16
Ph.xyz / R: 1.00 / Bmin: 1.65 / Bmax: 3.16
Ph.xyz / R: 2.00 / Bmin: 1.65 / Bmax: 3.16
Ph.xyz / R: 3.00 / Bmin: 1.65 / Bmax: 3.16
Ph.xyz / R: 4.00 / Bmin: 1.65 / Bmax: 3.16
Ph.xyz / R: 5.00 / Bmin: 1.65 / Bmax: 3.11
Ph.xyz / R: 6.00 / Bmin: 1.15 / Bmax: 1.17
>>>python -m dbstep examples/Ph.xyz --sterimol --atom1 1 --atom2 2 --scan 0.0:6.0:1.0
Ph.xyz / R: 0.00 / Bmin: 1.55 / Bmax: 2.86
Ph.xyz / R: 0.50 / Bmin: 1.65 / Bmax: 3.16
Ph.xyz / R: 1.00 / Bmin: 1.65 / Bmax: 3.16
Ph.xyz / R: 1.50 / Bmin: 1.65 / Bmax: 3.16
Ph.xyz / R: 2.00 / Bmin: 1.65 / Bmax: 3.15
Ph.xyz / R: 2.50 / Bmin: 1.65 / Bmax: 2.91
Ph.xyz / R: 3.00 / Bmin: 1.65 / Bmax: 3.16
L parameter is 5.95 Ang
```

Displayed in PyMOL, each new Bmin and Bmax axis is added along the L axis.
![Example2](Example2.png)


3. Percent Buried Volume

%Vb is measured by constructing a sphere (typically with a 3.5A radius) around the center atom and measuring how much of the sphere is occupied by the molecule. Output will include the sphere radius, percent buried volume (%V_Bur) and percent buried shell volume (%S_Bur) (zero in all cases unless a scan is being done simultaneously).
Expand All @@ -118,6 +129,9 @@ H 0.76 2.03 -1.25
3.50 41.77 0.00
```

For percent buried volume, the PyMOL script will overlay an appropriate sized sphere where measurement took place.
![Example3](Example3.png)

4. Vol2Vec Parameters

When invoking the --volume and --scan parameters simultaneously, vol2vec parameters can be obtained. In this case, a scan is performed using spheres with radii from 2.0A to 4.0A in 0.5A increments.
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