Definition: A replication-defective strain of Murine leukemia virus (LEUKEMIA VIRUS, MURINE) capable of transforming lymphoid cells and producing a rapidly progressing lymphoid leukemia after superinfection with FRIEND MURINE LEUKEMIA VIRUS; MOLONEY MURINE LEUKEMIA VIRUS; or RAUSCHER VIRUS.
infection: coord IM with RETROVIRIDAE INFECTIONS (IM) + TUMOR VIRUS INFECTIONS (IM) + LEUKEMIA, EXPERIMENTAL (IM)