You don't state what the I.D. of the Chemicon Ab is, nor the species / tissue prep. you are using.
I have compared Chemicon's AB1554 with Sigma's N3908 ( on rat and mouse Formalin-fixed P.wax sections).
Also, Novocastra have an anti human NGFR ( gp75) : NCL-NGFR, which I have not tested as it is stated as being human-specific.
I hope that I interpreted your request correctly.
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