Free R: Difference between revisions

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==Bad Values for Free R==

In October, 2011, there are ~~173~~ X-ray crystallographic entries in the [[PDB]] ~~deposited 1990 or later,~~ with free R values of >= 0.37. 45 of these have a resolution <= 3.0 Å, and 20 have a resolution of <= 2.0 Å. It seems likely that there are serious errors in most of these 45 models.

In October, 2011, there are 182 X-ray crystallographic entries in the [[PDB]] with free R values of >= 0.37. 45 of these have a resolution <= 3.0 Å, and 5 have a resolution of <= 2.0 Å. It seems likely that there are serious errors in most of these 45 models.

In October, 2011, there are 7 X-ray crystallographic entries in the [[PDB]] deposited 1990 or later, with free R values of >= 0.40, and resolutions of <= 2.5 Å. Most likely there are serious errors in these models. In one amazing case, [[1zff]], the resolution is given as 0.94 Å, the R value as 0.428, and the free R as 0.444.

In one amazing case, [[1zff]], the resolution is given as 0.94 Å, the R value as 0.428, and the free R as 0.444.

==No Value for Free R==

In October, 2011, there are 5,908 X-ray crystallographic entries in the PDB for which no free R value is given. Most of these were deposited before the mid-1990's, before the free R methodology was described by Br

==See Also==

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@@ Line 75: / Line 75: @@
 ==Bad Values for Free R==
 <!--In October, 2011, there are 79 X-ray crystallographic entries in the [[PDB]] deposited 1990 or later, with free R values of >= 0.40. The median resolution of these 79 entries is 4.2 &Aring;.-->
-In October, 2011, there are 173 X-ray crystallographic entries in the [[PDB]] deposited 1990 or later, with free R values of >= 0.37. 45 of these have a resolution <= 3.0 &Aring;, and 20 have a resolution of <= 2.0 &Aring;. It seems likely that there are serious errors in most of these 45 models.
+In October, 2011, there are 182 X-ray crystallographic entries in the [[PDB]] with free R values of >= 0.37. 45 of these have a resolution <= 3.0 &Aring;, and 5 have a resolution of <= 2.0 &Aring;. It seems likely that there are serious errors in most of these 45 models.
-In October, 2011, there are 7 X-ray crystallographic entries in the [[PDB]] deposited 1990 or later, with free R values of >= 0.40, and resolutions of <= 2.5 &Aring;. Most likely there are serious errors in these models. In one amazing case, [[1zff]], the resolution is given as 0.94 &Aring;, the R value as 0.428, and the free R as 0.444.
+In one amazing case, [[1zff]], the resolution is given as 0.94 &Aring;, the R value as 0.428, and the free R as 0.444.
+==No Value for Free R==
+In October, 2011, there are 5,908 X-ray crystallographic entries in the PDB for which no free R value is given. Most of these were deposited before the mid-1990's, before the free R methodology was described by Br
 ==See Also==