FIG. 1.
Location and sequence of the 12-amino-acid motif. (A) Location and sequence of the motif in MLV (amino acid 48 to 59 of MLV CA). MHR, major homology region. (B) Comparison of sequences in the motif among several gammaretroviruses. MDEV, Mus dunni endogenous virus; FeLV, feline leukemia virus; GaLV, gibbon ape leukemia virus; BaEV, baboon endogenous virus; KoRV, Phascolarctos cinereus (koala) retrovirus; PERV, porcine endogenous virus; SNV, spleen necrosis virus. The 12-amino-acid motif is shown in bold letters.