Detection of Phosphorylated Neuronal Potassium-Chloride Cotransporter 2 via Western Blotting

Take a cell lysate containing potassium-chloride cotransporter 2, or KCC2 proteins, which regulate neuronal chloride levels.

Phosphorylation at regulatory sites disrupts KCC2 function, modulating neuronal activity.

Add the lysate to beads conjugated with antibodies targeting phosphorylated KCC2. Incubate to allow binding, then wash to remove unbound proteins and cellular debris.

Treat with a denaturing buffer at a high temperature to release KCC2, then centrifuge to separate the beads.

Load the KCC2-containing supernatant onto an electrophoresis gel. Separate the proteins into bands to confirm the presence of phosphorylated KCC2.

Transfer the bands to a membrane, then incubate in a blocking solution to mask non-specific binding sites.

Incubate with primary antibodies targeting phosphorylated KCC2.

Wash, then incubate with enzyme-tagged secondary antibodies to label the primary antibodies.

Wash again, then add a chemiluminescent substrate, which reacts with the enzyme to produce light.

Measure the light intensity to quantify phosphorylated KCC2 in the lysate.

Pipette 300 microliters of protein G sepharose into a microcentrifuge tube. Then, centrifuge the solution at 500 G for two minutes. A