Polyamines can replace the dialyzable component from crude reticulocyte initiation factors.

@article{Salden1976PolyaminesCR,
  title={Polyamines can replace the dialyzable component from crude reticulocyte initiation factors.},
  author={Martin H. L Salden and Hans Bloemendal},
  journal={Biochemical and biophysical research communications},
  year={1976},
  volume={68 1},
  pages={157-61}
}