Excellent, even positivity throughout enterocyte cytoplasm.
Oesophageal mucosa is positive.
I recall that I used Citraconic acid as AR solution.
What appear to be osteoclasts ( bone remodelling) are positive.
Note the positive olfactory nerve fibres within the epithelium and the their tracks in the underlying connective tissue.
Upper image ( anti EGFr ab32077: ab52894 gave the same result) shows occasional intensely positive cells ( this ab should be double-diluted to get rid of what seems to me to be non-specific staining).
However, when using the anti phospho-EGFr there are many more positive cells