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Sequence alignment of the four Env gp160 sequences under study. First residue of pentapeptides unique to the viral sequences and not found in human proteins is given red. Pentapeptides unique to the viral sequences and conserved among the four Env gp160 sequences are underlined. Env gp160 sequences refer to UniProtKB/Swiss-Prot accession: (A) P03375; (B) Q90DZ7; (C) Q8UMG1; and (D) O93024.
