I am having major trouble finding a beta-galactocidase antibody that works on embryonic mouse tissue in paraffin. When I first did IHC, I used the beta-gal antibody from Cortex Biochem and had the antibody working beautifully with very little background. However, the company no longer exists so we then ordered from Fitzgerald (catalog #20C-CR7001RP). I have tried and tried again to get this to work using different dilutions, antigen retrieval, and amplification techniques. However, it is not working at all...there is absolutely no specific staining. It is entirely non-specific so it is pretty much useless to me. If anyone knows of other beta-galactocidase antibodies that they were able to get to work on paraffin sections of embryonic mouse tissues, I would really appreciate your help and advice. Thanks!