I've been wondering about this for years now, I wonder if it is related: "While performing immunohistochemistry on rabbit brain sections, we noticed a small nu

I've been wondering about this for years now, I wonder if it is related: "While performing immunohistochemistry on rabbit brain sections, we noticed a small number of neurons that were stained with only the secondary antibodies to rabbit IgG. The staining was distinctively localized in the dendrites and cytoplasm of cell bodies, in a Golgi-like staining, and was obviously different from a ubiquitous ‘background’ staining." http://www.ncbi.nlm.nih.gov/pubmed/12426046 http://www.ncbi.nlm.nih.gov/pubmed/12426046 AFAIK, that research has gone largely ignored. It could mean a lot of immunohistological results are inaccurate.