Fluorescent dextrans such as the Alexa Fluor® 488 dextran, 3,000 MW are widely employed to trace neuronal projections and can function efficiently as anterograde or retrograde tracers, depending on the methodology and tissue type used. This nominally 3,000 MW dextran offers several advantages over higher molecular weight dextrans, including faster axonal diffusion and greater access to peripheral cell processes.
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