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The Cα backbone of domain D1 of CD155 based on its homology to protein zero. Shown is the nomenclature of the β-strands, the two sites of potential glycosylation, and strategically numbered residues. Residues that were found to make contact with the north rim of the canyon are colored green, with the south rim yellow, with the floor blue, and with the additional surface area red. Potential glycosylation sites are colored black.
