Hello, after a stress protocol in mice I have seen changes in Fgf2 gene expression in the brain and hoping now to check protein levels. Immunofluorescence would be ideal as I already have flash frozen slices on slides but I cannot seem to find a reliable antibody that works with my experiment setup (I am planning to double stain with rabbit-anti Cd31). Has anyone used or knows of a non-rabbit antibody that might work, or an ELISA kit that provides reliable results for Fgf2? Thanks in advance.