I mean, not the immediate "after" because I think it could bind in another TrkB receptor.

The question is: What happens with the molecule after its function is done? The molecule is totally destroyed? Any chance of some part of it still being used on another process like the Pro/mature BDNF activating different pathways?

Someone knows how much time do we have before this loss of function happens? I think it is some minutes, but I can't find that specific info.