PMID: 3766940Aug 1, 1986Paper

One-step procedure for the determination of thymosin beta 4 in small tissue samples and its separation from other thymosin beta 4-like peptides by high-pressure liquid chromatography

Analytical Biochemistry
E Hannappel

Abstract

Thymosin beta 4 has been determined by a simple and fast one-step procedure in different tissues of rats. The tissues (1 to 40 mg) were disintegrated and deproteinized by homogenization in perchloric acid. After neutralization by potassium hydroxide the supernatant solution was used for determining thymosin beta 4 by reverse-phase HPLC without further manipulations. Not only does this procedure avoid artificial proteolysis as effectively as extraction of tissues by guanidinium chloride or boiling buffer, but it offers two further advantages. First, no additional steps--as for example desalting--are necessary prior to HPLC and thus the risk of losing thymosin beta 4 is eliminated. Using this procedure thymosin beta 4 is recovered quantitatively. The method is linear over the range 0.04 to 1.13 nmol and thymosin beta 4 is well separated from other thymosin beta 4-like peptides known to be present in mammals; i.e., thymosin beta Ala4, thymosin beta 9, thymosin beta 10, and thymosin beta Arg10. Second, the acid-insoluble pellet of the same extract can be used to determine the DNA content of the sample. Thus it is possible to relate thymosin beta 4 to DNA, which then allows comparing cells of different tissues and cell lines to one ...Continue Reading

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