under the stipulation that the enzyme obtained from plasma membranes of aged ( 60 hrs of inoculation ) cells has identical values of km and ki but lower values as compared to young cells ( 24 hrs of inoculation ) of vmax and v0 , it is concluded that the decrease of the nadh-oxidase activity upon ageing of cultures is due to the decrease in the amount of active molecules of and-oxidase in mycoplasm cell plasma membranes .
C0007603
plasma membranes
C0007634
cells