Abstract
We determined the nucleotide sequences of the envelope genes of the Snyder-Theilen and Gardner-Arnstein isolates of feline leukemia virus subgroup B. Comparison of the deduced amino acid sequences of the envelope gene products revealed regions of sequence divergence, which we relate to structural features of the viral protein. We also examined nucleotide sequences within the long terminal repeats of these related isolates of feline leukemia virus subgroup B.