摘要:
The present invention relates to an information acquisition method of acquiring information of distribution of a protein or peptide in a sample based on mass information obtained by mass spectrometry of the protein or peptide. The method includes mass spectrometry of a definite region of the sample after limited proteolysis of the protein or peptide and acquisition of information relating to distribution using an ion peak that has a two-dimensional intensity distribution having a Pearson product-moment correlation coefficient of 0.5 to more and 1.0 or less in the definite region against the two-dimensional intensity distribution of the parent ion of the protein or the peptide subjected to the limited proteolysis and has a peak intensity ratio of larger than 1.0 against the peak intensity of the integrated spectrum of the parent ion in the definite region, wherein the m/z of the ion peak is greater than 500.
摘要:
ABSTRACT To provide a technology for obtaining a probe carrier which is quality assured by an effective inspection program and an effective producing steps. Quality of a produced probe carrier is ensured by expanding test items in the processes from synthesis and purification of the probe to fixation thereof to a carrier.
摘要:
A laser scanning microscope apparatus includes an irradiation unit (1) including an objective lens (13), a photodetector unit (3), an XY-scanning unit (12), and a Z-scanning unit (1, 2, 41). The irradiation unit (1) focuses a laser beam with the objective lens (13) to a specimen (6). The photodetector unit (3) detects light (L) generated from a position (S) irradiated with the laser beam. The XY-scanning unit (12) scans the laser beam in an X-direction perpendicular to an optical axis of the objective lens (13) and in a Y-direction perpendicular to the optical axis and the X-direction. The Z-scanning unit (1, 2, 41) scans the laser beam in a Z-direction parallel to the optical axis. When acquiring XY-two-dimensional image data by detecting the light (L) while scanning the irradiated position (S) in the X-direction and the Y-direction, the apparatus detects the light (L) while scanning the irradiated position (A) also in the Z-direction.
摘要:
A more effective noise reduction method is provided. In the method, when mass spectrum information having a spatial distribution is processed, the whole data is taken as three-dimensional data (positional information is stored in an xy plane, and spectral information is stored along a z-axis direction), and three-dimensional wavelet noise reduction is performed by applying preferable basis functions to a spectral direction and a peak distribution direction (in-plane direction).
摘要:
An object of the present invention is to provide a method of comprehensively visualizing a constituent in tumor tissue or the like at a cellular level. The present invention provides a method of forming a two-dimensional distribution image of a target constituent based on information on the mass of constituents of the tissue section wherein, as the internal standard material, any one of actin, tubulin and GAPDH is used in the intracellular region, one of histone and nucleic acid is used in the nuclear region, and one of albumin and cytokine is used in the extracellular region.
摘要:
A method of analyzing a measuring sample is provided which is capable of accurately analyzing the state of a probe disposed on a carrier and formation/unformation of a hybrid between the probe and a target nucleic acid, for example, imaging of the disposing locations and quantitative analysis thereof. The state of a nucleic acid probe formed in a measuring sample obtained by reacting a sample with a probe carrier or formation/unformation of a hybrid between the probe and a target nucleic acid is detected by measurement by the Time-of-Flight Secondary Mass Spectroscopy while being labeled with a marker substance capable of generating fragment ions that are not generated by fragmentation of the probe or the target substance.
摘要:
The problem to be solved by the present invention is to provide a method for treating a polypeptide including a cysteine residue for enhancing the sensitivity of detection thereof in mass spectrometry using charged particles. A mass spectrometry method for a polypeptide including a cysteine residue is provided which includes treating the polypeptide including a cysteine residue with a cyanation agent, treating the cyanated polypeptide with a base, and then desorption ionizing the base-treated polypeptides using charged particles for mass spectrometry.