Editing ValidatorDB:Database contents (section)

==Correct chirality==
If no issues are detected during the ''chirality'' analyses, the validated molecule is marked as having '''correct chirality''', because it contains all atoms present in the model, and each of these atoms has the same chirality in the validated molecule and in the model.

Some types of chirality errors do not constitute real issues, but are artifacts of the automated chirality determination procedure. Specifically, an error in planar chirality may just mean that the chiral atom is situated slightly above or below the plane compared to its equivalent in the model from wwPDB CCD. Further, an error in high order chirality often marks the involvement of phosphate O atoms in salt or ester formation, or merely a different PDB format identification of phosphate O atoms of the validated molecule compared to the model. Therefore, if the validated molecule is found to have planar or high order chirality errors, but no other type of chirality issues, the molecule is marked as having '''correct chirality (tolerant)'''.
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