Inventors:
Paul Pevsner - New York NY, US
Frederick Naftolin - Woodbridge CT, US
Douglas C. Miller - Belle Mead NJ, US
Dean Hillman - New Hyde Park NY, US
Brian K. Stall - Bedford NH, US
Steven M. Wishnies - Columbia MD, US
Assignee:
New York University - New York NY
International Classification:
B01D 59/44, H01J 49/00, H01J 49/40
Abstract:
The present invention relates to the use of post source decay (PSD) or collision induced dissociation (CID) direct tissue (DT) MALDI-TOF or DT-MALDI-TOF-TOF mass spectrographic identification of biological molecules in a tissue or cellular sample without the need for further protein extraction. This method provides for studying cells or tissues by direct tissue MALDI (DT-MALDI), thereby substituting in situ protein release for further protein extraction. Mass/intensity data was processed with Mascot© software interrogation of the NCBI database. These results are proof of principle that DT-MALDI, combined with bioinformatics, can directly identify proteins in cells and tissues from their mass spectra.