I would like to perform tyrosine hydroxlase ELISA. Looking for protocols on how to isolate protein and successful kits. Do I isolate the SN/VTA or homogenize the whole brain, etc? I would ideally like to use half the brain for confocal imaging and the other half for ELISA. Not sure if that is possible considering I usually perfuse rats for imaging but don't think that would work for protein isolation. Thanks!