两次双水相萃取结合高效液相色谱法选择性分离唾液蛋白质的.pdf

两次双水相萃取结合高效液相色谱法选择性分离唾液蛋白质的.pdf

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两次双水相萃取结合高效液相色谱法选择性分离唾液蛋白质的.pdf

2014年6月 Vol.32 No.6 June 2014 ChineseJournal of Chromatography 600~603 Article DOI:10.3724/ SP.J.1123.2014.03031 Preliminary study of two steps aqueous two⁃phase extraction combined with high performance liquid chromatography for saliva protein selective separation 1,2 1∗ 3 1 ZHAO Xinying ,QU Feng ,QIN Hao ,LUOAiqin (1.School of LifeScience,Beijing Institute of Technology,Beijing 100081,China; 2.Beijing CenterforPhysical and ChemicalAnalysis,Beijing 100089,China; 3.Institute of Genetics andDevelopmentalBiology,ChineseAcademy of Sciences,Beijing 100101,China) Abstract:Salivaprotein separation by one⁃step aqueous two⁃phase extraction (ATPE) in the system of 15% (mass ratio if not specified) PEG⁃4000/ 8% NaH PO was presented. The proteins extracted from the top and 2 4 bottom phases were separated and characterized by high performance liquid chromatography (HPLC) respec⁃ tively. Under the optimized gradient elution procedure, more saliva protein peaks in the two phases were shown. Salivaprotein peaks in 50 min gradient were divided intoten specificgroupswhich were classifiedinto six sections based ontheprotein distributioninthetop andbottomphases.Then,thetop orbottomphasewas performedthe second step ATPE. Possible reasons for protein partition and retention difference are discussed briefly. Resultsshowthatsomeproteinscanbeseparatedcompletelyinone⁃stepATPE,whilesomecanbesep⁃ arated in the following two⁃step ATPE. The combinatio

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