Are you planning on using mounted or free-floating sections? I use a santa-cruz ab at 1:20,000 with DAB visualisation with free-floating sections and more than happy to attach a protocol if it'd be of use
It is sometimes useful to use as controls, cell lines in whick the target gene has been silenced by siRNA. This is a very good control to check specificity. We performed that several times. Please check the article: Mod Pathol. 2005 May;18(5):719-27