text: The most common mammalian expression systems are Chinese Hamster ovary (CHO) and Human embryonic kidney (HEK) cells.
  * Chinese hamster ovary cell
  * Mouse myeloma lymphoblstoid (e.g. NS0 cell)
  * Fully Human
  ** Human embryonic kidney cells (HEK-293)
  ** Human embryonic retinal cells (Crucell's Per.C6)
  ** Human amniocyte cells (Glycotope and CEVEC)