blood samples were collected from 15 normal male wistar rats weighing 200-250 g for the determination of ggt activity in plasma prepared with heparin ( group p ( h ) , n = 10 ) , in serum ( group s , n = 15 ) and in serum with heparin added ( group s + h , n = 10 ) .
C0032105
plasma
C0229671
serum