WB; IHC, Frozen; ELISA; Neut, Neutralizing IHC, ELISA (1 site), Western Blot, dot blot, inhibition of biological activity in vitro/in vivo. Recommended to be used at a dilution of 1:500 to 1:2000 for immunohistochemistry, ELISA and Western blot. 1:10 to 1:50 for inhibition of biological activity in vitro. Use neat for in vivo studies at 5-10 μL/g body weight. Note that the concentration of NT4 is generally low in most tissues nevertheless, neonatal testes of rat can be used as a good positive control. Biosensis recommends optimal dilutions/concentrations should be determined by the end user.