I am doing patch electrophysiology on sensory neurons labeled with WGA. I have purchased 405S and 405M WGA from Biotium, the only company I've seen that sells it. We dilute 1mg with 100ul of 1% DMSO. we have no problems with the green and red WGA but cannot get this to work. We sacrifice the animals 1 day after injection. I have tried waiting 2 days without results. I have also tried injecting double our normal amount. All that I see is non specific dim labeling on the green filter cube.