The line was derived from the WR19 tumor induced by Abelson murine leukemia virus (see also ATCC TIB-70)
but does not produce Abelson virus.
The cells are negative for surface immunoglobulin (sIg-) and Ia (Ia-).
The line does not pinocytose neutral red, phagocytose zymosan or latex beads and does not secrete lysozyme.
Tested and found negative for ectromelia virus (mousepox).