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Primary sequences and alignment of the homologous ground squirrel and woodchuck Env-Mar1 protein. Primary amino acid sequence and characteristic structural features of the homologous Env-Mar1 proteins from the ground squirrel Ictidomys tridecemlineatus and from the woodchuck Marmota monax. The same color code and abbreviations as in Fig. 2 are used. Asterisks indicate amino acid identity, and colons indicate amino acid similarity.
