FIG. 5.
Predicted amino acid sequence of the V3 -V6 region of the FIV envelope glycoprotein from revertant viruses (627W135 and 628W135) at 135 weeks postinfection. Lines under the sequence delineate the variable regions 3 to 6. Predicted sites for N-linked glycosylation (gray dots) and residues in the V3 loop affecting CXCR4 usage (↓) are marked. Sequences are shown relative to the parent molecular clone PETF14 and to the GL8414 molecular clone for comparison. Sequences were consistent between three independent clones.