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*PROCHECK sample plots*

# Plot 5. Side-chain parameters

## Description

The five graphs on the side-chain parameters plot show how the structure
(represented by the solid square) compares with well-refined structures at
a similar resolution. The dark band in each graph represents the results
from the well-refined structures; the central line is a least-squares fit
to the mean trend as a function of resolution, while the width of the band
on either side of it corresponds to a variation of one standard deviation
about the mean. In all cases the trend is dependent on the resolution.
**Note**. This plot is intended as a **rough guide only** and too much
reliance should not be placed on getting results that are "better than
structures at the same resolution".

The 5 properties plotted are:

**a. Standard deviation of the chi-1 gauche minus torsion angles.**
**b. Standard deviation of the chi-1 trans torsion angles.**
**c. Standard deviation of the chi-1 gauche plus torsion angles.**
**d. Pooled standard deviation of all chi-1 torsion angles.**
**e. Standard deviation of the chi-2 trans torsion angles.**

## Options

The main options for the plot are:-

- The plot can be in colour or black-and-white.

These options can be altered by editing the parameter file,
**procheck.prm**, as described here.

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*PROCHECK sample plots*