Tissue    Rep       NSC       RSC       Tag
       NewLiver      A      0.00        NA         1
       NewLiver      B      0.00        NA         1
      NewSpleen      A     -1.00        NA         1
      NewSpleen      B     -1.00        NA         1
       OldLiver      A      0.00        NA         1
       OldLiver      B      0.00        NA         1
      OldSpleen      A     -1.00        NA         1
      OldSpleen      B     -1.00        NA         1