Partial sequence homology between retroviruses of various species in the C-terminal part of the env gene.

We determined the nucleotide sequence of a molecularly cloned cDNA from the endogenous cat virus RD114. Comparison of the nucleotide sequence and the deduced amino acid sequence, respectively, with other known sequences of retroviruses revealed two conserved domains in the viral transmembrane protein, which we relate to structural features of the protein.