Metabolomics Workbench : NIH Data Repository

MB Sample ID: SA051448

Local Sample ID:	0029.d
Subject ID:	SU000919
Subject Type:	Animal
Subject Species:	Mus musculus
Taxonomy ID:	10090

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Sample Preparation:

Sampleprep ID:	SP000926
Sampleprep Summary:	Plasma: LC-MS samples were prepared from plasma (10 μL) via protein precipitation with the addition of nine volumes of 74.9:24.9:0.2 v/v/v acetonitrile/methanol/formic acid containing stable isotope-labeled internal standards (valine-d8, Isotec; and phenylalanine-d8, Cambridge Isotope Laboratories; Andover, MA). The samples are centrifuged (10 min, 9,000 x g, 4°C), and the supernatants were injected directly. Nucleus accumbens and Hypothalamus: Frozen brain tissue samples were homogenized in 4 volumes of HPLC water (J. T. Baker, Center Valley Pa.) using a TissueLyser II (Qiagen, Hilden, Germany) with 3mm tungsten beads at 20 Hz in two 2-minute cycles. Homogenates were then aliquoted for profiling. Samples were prepared from lysates(10 μL) via protein precipitation with the addition of nine volumes of 74.9:24.9:0.2 v/v/v acetonitrile/methanol/formic acid containing stable isotope-labeled internal standards (valine-d8, Isotec; and phenylalanine-d8, Cambridge Isotope Laboratories; Andover, MA). The samples are centrifuged (10 min, 9,000 x g, 4°C), and the supernatants were injected directly.

Sampleprep ID:

SP000926

Sampleprep Summary:

Plasma: LC-MS samples were prepared from plasma (10 μL) via protein precipitation with the addition of nine volumes of 74.9:24.9:0.2 v/v/v acetonitrile/methanol/formic acid containing stable isotope-labeled internal standards (valine-d8, Isotec; and phenylalanine-d8, Cambridge Isotope Laboratories; Andover, MA). The samples are centrifuged (10 min, 9,000 x g, 4°C), and the supernatants were injected directly. Nucleus accumbens and Hypothalamus: Frozen brain tissue samples were homogenized in 4 volumes of HPLC water (J. T. Baker, Center Valley Pa.) using a TissueLyser II (Qiagen, Hilden, Germany) with 3mm tungsten beads at 20 Hz in two 2-minute cycles. Homogenates were then aliquoted for profiling. Samples were prepared from lysates(10 μL) via protein precipitation with the addition of nine volumes of 74.9:24.9:0.2 v/v/v acetonitrile/methanol/formic acid containing stable isotope-labeled internal standards (valine-d8, Isotec; and phenylalanine-d8, Cambridge Isotope Laboratories; Andover, MA). The samples are centrifuged (10 min, 9,000 x g, 4°C), and the supernatants were injected directly.