We are beginning a retrograde tracing study in rats. We injected DiD into the rats and in 4 weeks we will perfuse and harvest the brainstems. My question is, is vibratome sectioning better than cryostat sectioning? The literature that accompanied the dye said either is an option, but some have noted dye leaching out when cyrostat sectioned. How common is this problem? If vibratome is the better choice, is there a good embedding protocol?

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