Why Biotin tracer assay is more commonly used for Blood Testis Barrier (BTB) assessment rather than Evans blue or Albumin injection?

I am trying to assess BTB integrity. Most articles show experiments with Biotin Tracer. But incase of Blood brain barrier Evans blue or albumin is used often. Why in case of BTB biotin tracer is...

28 September 2016 1,444 3 View