The action of various sera on colony formation and DNA synthesis of murine thymocytes in culture.

ABSTRACT

Murine thymus cells were caltivated up to 10 days in a semi-solid medium. Both macroscopically visible colonies and DNA synthesis (identified by 3H-thymidine incorporation) were counted with and without added sera. According to their origins the sera exerted different modifications of the cultivated cells behaviour. Changes of colony number and of thymidine incorporation were quite independent on each other.