Abstract
Summary
An interferon-like substance liberated by tortoise kidney cells possesses some biological and physico-chemical properties previously described for interferons derived from virus-infected homeothermic animal cells. It is a cell-related protein which inhibits intracellular multiplication of related and unrelated viruses. The hypothesis that such substances might represent an early defense mechanism in phylogenetic evolution is discussed.
Get full access to this article
View all access options for this article.