other

endogenous ecotropic MuLV 9
endogenous ecotropic MuLV 8
endogenous ecotropic MuLV 7
endogenous ecotropic MuLV 6
endogenous ecotropic MuLV 5
endogenous ecotropic MuLV 4
BALB/c defective provirus 1
mammary tumor virus locus 45
endogenous ecotropic MuLV 49
mammary tumor virus locus 50