I have brain cryosections on gelatin coated slides. I keep them in -20 or -80. For IHC, I dry the sections for 30 min at room temperature, wash them for 15 min with PBS and start antigen retrieval process. I tried HIER with sodium citrate pH6 at 95°C for 20min and the tissues were fine. However, when I tried EDTA pH9 with the same temperature and time, the tissue comes off the slide. Can anyone help me with this issue?
Thank you