Naturally Occurring Retroviruses (RNA Tumor Viruses). I.

Abstract

This is the first of two papers describing the naturally occurring retroviruses (RNA tumor viruses). Here, the general properties of these viruses and the biology of the fish, reptilian, chicken, and mouse retroviruses are described. In the next issue of Cancer Investigation the biologic properties of the cat, cattle, primate, and newly discovered human retroviruses will be discussed.