Crystal growth: Tips and Tricks: Difference between revisions

→‎Reducing the mosaicity: links and rearrangement vs cryo articles
(→‎Reducing the mosaicity: links and rearrangement vs cryo articles)
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==Improving crystals==
==Improving crystals==
===Reducing the mosaicity===
===Reducing the mosaicity===
Things to try in the order crystallization-related / cryo-related / geometry-related:
 
# change precipitant, pH, temperature; try additives
Things to try concerning crystallization - see also [[Improving crystal quality]].
# try co-crystallization with glycerol (2%, 5% or 10%).
For cryo question see [[cryo]] and [[Data collection: Tips and Tricks]].
# incubate your crystal longer in your cryo/stabilization solution.
 
# optimize the cryo conditions
* change precipitant, pH, temperature; try additives
# anneal (freeze/thaw) the crystal - '''DISCLAIMER''': your mosaicity can go up as well as down with annealing
* try co-crystallization with glycerol (2%, 5% or 10%).
# the mosaicity may be anisotropic, so try to orient the crystal in the loop such that you can shoot along a different axis
* incubate your crystal longer in your cryo/stabilization solution.
# try smaller crystals (often growth faults lead to end of crystal growth)
* optimize the cryo conditions
# use a synchrotron beam (as it is less divergent than the usual home source, and the apparent mosaicity is the sum of the crystal mosaicity and the crossfire)
* anneal (freeze/thaw) the crystal - '''DISCLAIMER''': your mosaicity can go up as well as down with annealing
# shoot at parts of the crystal to find if there are good and bad parts (this requires a small beam)
* the mosaicity may be anisotropic, so try to orient the crystal in the loop such that you can shoot along a different axis
# look at Elspeth Garman's papers, and/or check her talks at RapiData workshops (anybody with a link??)
* look at Elspeth Garman's papers, and/or check her talks at RapiData workshops (anybody with a link??)


==References==
==References==
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