TrkB Antibody Host:Rabbit Antibody Type:Polyclonal Species Reactivity:Human, mouse, rat, chicken Application:Western blot, Immunoprecipitation, Immunofluorescence Western blotting (0.5-4 μg/ml), immunofluorescence (5-10 μg/ml). However, the optimal concentrations should be determined individually. Trk protein exists as variably glycosylated entities with the major forms having molecular weights of 140 kDa, 110 kDa, and the unglycosylated form of 80 kDa.