passages.id: split_8_test_915_passage
passages.type: progene_text
passages.text: A panel of mouse T-cell lymphomas induced by SL3-3 murine leukemia virus ( MLV ) and three primer binding site mutants thereof ( A. H. Lund , J. Schmidt , A. Luz , A. B. Sorensen , M. Duch , and F. S. Pedersen , J. Virol. 73 : 6117 - 6122 , 1999 ) were analyzed for the occurrence of recombination between the exogenous input virus and endogenous MLV - like sequences within the 5' leader region .