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.gov website belongs to an official
government organization in the United States.
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Surface-exposed sites are under significantly less evolutionary constraint than buried sites
| Sites | Exposed | Buried |
|---|---|---|
| dN/dS | 0.49 | 0.35 |
The dN/dS ratio is shown for sites with an average relative surface exposure [calculated by SABLE (42)] of >70% (exposed sites) and <50% (buried sites). Italics indicates significant differences.
