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Crosslinking Neuronal Surface Proteins in the Mouse Brain using a Chemical Crosslinking Assay

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Transcript

Begin with an isolated mouse brain in an ice-cold buffer.

Transfer the brain to a brain matrix, with the ventral side facing up.

Insert razor blades to serially cut the anterior part of the brain.

Lift the slices by holding the blades together, leaving the posterior part behind. Separate the razor blades and place them on a chilled surface with brain slices facing up.

Select the desired slice and extract the region of interest.

Divide and mince the tissue.

Transfer the minced tissue into a tube containing cerebrospinal fluid supplemented with the chemical BS3.

Invert and mix the tube to break the tissue into smaller pieces, then incubate with rotation.

BS3, a cell membrane-impermeable chemical, crosslinks neuronal surface proteins like GABA receptors while internal GABA receptors remain unaltered.

Add glycine to quench the crosslinking reaction.

The sample is ready for evaluation of surface GABA receptor levels.

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Crosslinking Neuronal Surface Proteins in the Mouse Brain using a Chemical Crosslinking Assay

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