| Easy to use |
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Create a description of your model and go
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| Flexible geometry definition |
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Can define any type of molecule
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All standard groups are predefined
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New groups can be defined from small-molecule data
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Chemical links to symmetry mates can be incorporated.
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| Tools for model building |
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Provides lists of the worst bond lengths, angles, etc.
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Produces map files for display
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Finds the highest peaks in a difference map
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| Preconditioned Conjugate Gradient method |
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Fewer cyclesof refinement are required
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B factors are less biased to their starting values
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All parameters varied in each cycle
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| Fast execution time |
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Usually 20 times faster than other programs
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Near real-time performance
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| Stereochemical restraints on B factors |
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Low resolution models have B values consistant with those of high resolution
models
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| Disordered solvent model |
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The solvent model is simple and accurate
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It allows use of data to the lowest resolution
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Better estimate of average B factor
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Better maps are the molecule's surface
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