DATABASE: To Build a Tooth

Science  31 Mar 2006:
Vol. 311, Issue 5769, pp. 1841
DOI: 10.1126/science.311.5769.1841d

A tooth starts out as a thick patch in the lining of an embryo's mouth. To find out which genes morph these cells into a pearly white, bite into this database from the University of Helsinki in Finland. The site houses qualitative data pulled from the literature on gene activity during tooth development. You can sort through gene lists to discover when and where a specific one is active. Included is a diagram in which orange marks where the sonic hedgehog gene is working in the first molar of an embryonic mouse.

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