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Proteomics. 2007 Jul;7(14):2340-9.

An improved method of sample preparation on AnchorChip targets for MALDI-MS and MS/MS and its application in the liver proteome project.

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Beijing Genomics institute, Chinese Academy of Science, Beijing, China.


An improved method for sample preparation for MALDI-MS and MS/MS using AnchorChip targets is presented. The method, termed the SMW method (sample, matrix wash), results in better sensitivity for peptide mass fingerprinting as well as for sequencing by MS/MS than previously published methods. The method allows up-concentration and desalting directly on the mass spectrometric target and should be amenable for automation. A draw back caused by extensive oxidation of methionine and tryptophan in the SMW method can be alleviated by the addition of n-octyl glucopyranoside and DTT to the sample solution. The method was validated for protein identification from a 2-DE based liver proteome study. The SMW method resulted in identification of many more proteins and in most cases with a better score than the previously published methods.

[Indexed for MEDLINE]

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