Growth and G1 arrest of sarcoma virus trnasformed cells in serum free media.

Rous-sarcoma transformed BHK cells can be continuously cultured in a medium containing Eagle's Minimal Essential Medium, iron and biotin. The rate of cell multiplication increased when serine, or serine plus other non-essential amino-acids were added to the medium. With biotin deleted from the medium there is a reduction in DNA synthesis and most cells are blocked in G1.