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Protein Crystallography



Meiji Microscopes for Protein Crystallography

A good stereo microscope is used during evaluation of crystallization experiments for distinguishing between amorphous and crystalline specimens. A typical setup would consist of a zoom microscope with a crossed polarizing attachment and at least 10x magnification. Higher magnifications are ideal for easy detection of small microcrystals.


Examination of Crystallization Drops

 

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EMZ Stereo on RZBD Stand with Fiber Optic Illuminator


The setup shown above is suitable for looking at properties of crystals such as birefringence (using the MA550 rotatable analyzer and MA667 polarizer) and for identifying conditions that cause precipitation or crystal growth. In the latter case, a polarizer would not be used because the color of the precipitate is a crucial indicator.

The RZBD stand enables darkfield illumination for observation of samples in which the precipitate is white or transparent, such as with gelatinous proteins.

The following is a list of parts for this configuration:

Part Number Description
EMZ-5TR Zoom stereo body
MA502 10x eyepieces (paired)
FK Focusing holder, extended throat depth
RZBD Brightfield/darkfield stand
KBL/1 Flange
KBL/2 Pillar
MA550 Rotatable polarizing filter
MA667 Polarizing plate
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