Tissue    Rep       NSC       RSC       Tag
       NewLiver      A      0.00        NA         1
      NewSpleen      A      0.00        NA         1
      NewSpleen      B      0.00        NA         1
       OldLiver      A      2.00        NA         1
      OldSpleen      A      2.00        NA         1
      OldSpleen      B      2.00        NA         1