What are ACTH-R, 17bHSD type 5 and Cytochrome b5 antibodies that work on sheep paraffin embedded tissues? I'm looking at adrenal morphology using immunohistochemsitry in sheep adrenal cortices and really struggling to find a relevant or specific antibody that works in sheep! I have already tried one from Santa-Cruz and it ended up in no reactivity even after trying the recommended antibody dilutions. Your suggestions are much appreciated!