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United States Department of Agriculture

Agricultural Research Service

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Image Number D2838-2

In the Obesity and Metabolism Research Unit at Davis, California, ARS chemists John Newman and Theresa Pedersen review data from a UPLC-ESI-MS/MS system used to measure methylmalonic acid, an indicator of vitamin B12, in a blood sample.


Photo by Alison H. Keenan.

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Last Modified: 3/14/2017
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