Cullen B M, Walker H C
Int J Radiat Biol Relat Stud Phys Chem Med. 1980 Nov;38(5):513-24. doi: 10.1080/09553008014551331.
The value of K for mouse Ehrlich ascites cells depends on their phase of growth. Cells were grown either in vitro or in vivo but were irradiated and assayed in vitro. K was 1.7 times greater for cells in the exponential phase of growth than for those in plateau phase irrespective of the pre-irradiation growth conditions.