Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Neighbor-joining tree showing diverse S. mutans sequence types (STs 1 to 18) between, while showing similar types within, caries (+) or caries-free (−) strain donors. The neighbor-joining tree was constructed from concatenated sequences of the housekeeping genes pfl, pyk, tuf, and ppaC and the AgI/II adhesin gene. The bar indicates the number of base differences per sequence.
