Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

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.

View full-text article in PMC

. 2009 Aug 31;118(1):73–79. doi: 10.1289/ehp.0901149

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Publication of EHP lies in the public domain and is therefore without copyright. All text from EHP may be reprinted freely. Use of materials published in EHP should be acknowledged (for example, ?Reproduced with permission from Environmental Health Perspectives?); pertinent reference information should be provided for the article from which the material was reproduced. Articles from EHP, especially the News section, may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.

PMC Copyright notice

DNA synthesis and retention of radiolabeled DNA in differentiating PC12 cells. In (A) cells were exposed to test agents simultaneously with NGF for 2 days, and then [³H]thymidine incorporation into DNA was measured for a 1-hr period at the end of exposure. In (B), undifferentiated cells were radiolabeled with [³H]thymidine; cells were then exposed simultaneously to test agents with NGF for 6 days, and the radiolabel retained in the DNA fraction was determined. (C) Retained radiolabel after 6 days relative to the DNA content. Data represent mean ± SE obtained from the number of determinations shown in parentheses. For A–C, ANOVA: treatment, p < 0.0001.

*p < 0.05 compared with the corresponding control group.