Which Negative Stain is Best for Sensitive Large Molecular Complexes in EM?

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i_a_n
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I have isolated a large molecular complex whose integrity is very sensitive to increasing ionic strength and thus had to be prepared for EM using low ionic strength solutions. And my goal is image this by electron tomography by collecting a dual tilt series of 120 images. Other experimental constraints are that I lack a cold specimen holder and thus must to this experiment at room temperature. From the possible negative stains that are available generally, which should I choose to prepare my specimen and why?
 
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Pythagorean said:
You forgot to change the last "your" to "my". Is this a homework question?
Yes. But can you help me somehow?