Hitachi Software Engineering Company, Ltd.

Tsunehiko Watanabe

Takuro Tamura

Yasuyuki Nozaki

Ryo Nakashige

Keisuke Yamamoto

Junji Yoshii

Tadashi Mizunuma

Tateo Nagai

Yuichi Minesaki

Fumitoshi Ogura

Necessary information can be easily extracted from a plurality of databasesin which biological substance information is stored. Data is downloaded from the plurality of databases. From the downloaded data is extracted information indicating links between two databases, a detailed description of each data, and sequence data for homology search, which together constitute an index. The thus extracted indexis distributed to a user facility, where a userconducts a search using the distributed index.

Data distribution method, data search method, and data search system

The present invention represents a global state of branches in a whole dendrogram as well as detail of states of individual subtrees, to aid focusing of groupings and selection of a clustering method. The present invention selects a branch/subtree in a dendrogram displays the subtree on a separate window, replaces the subtree with an icon then restores the icon into the original subtree, and/or searches keywords contained in information of biopolymers in the subtree then highlight the locations of biopolymers containing the keywords in its information.

Method and system for displaying dendrogram

The present invention provides methods for extracting similar expression patterns and related biopolymers considering natures that are characteristic of expression data of, for example, genes. A segment of experiment cases which includes an expression of interest is selected as a search range among an expression pattern of a reference gene or the like. By comparing the selected segment of the expression pattern with expression patterns of a group of candidate genes or the like, genes having an expression pattern with at least a partial similarity are searched from the group of candidate genes. A partially taken out curve (a part of an, expression pattern) is transferred to overlap an expression pattern curve of a candidate gene to search expression patterns with a similar pattern shape.

Methods for extracting similar expression patterns and related biopolymers

The present invention discloses a method for displaying gene expression patterns of multiple genes that change according to the experiment cases, where a first axis represents the genes and a second axis represents the experiment cases. The method comprises two steps. The first step consists of designating a segment along the second axis in the expression pattern data of the multiple genes. The second step comprises clustering the expression pattern data within the designated segment along the second axis based on a predetermined reference value, repeating clustering within the same cluster in a forward or reverse direction along the second axis while changing the reference value, and displaying the results according to a predetermined display format.

Method and apparatus for displaying gene expression patterns

The present invention aims at providing a visual display which is useful in roughly understanding the state of groupings and changes, by comparing expression data of genes from two experiments based on expression data of one sample common to both experiments. In order to compare data of expression levels obtained from different experiments each using two types of samples, three types of expression levels are displayed in three-dimension as mediated by the data of the common sample used in both experiments. Specifically, expression level data for Samples A and B and expression level data for Samples A and C are combined and converted into single three-dimensional data and displayed as points inside a sphere. Alternatively, expression states of each gene to Samples A, B and C are mapped on a sphere with respect to a ratio between Sample A and Sample B and a ratio between Samples A and C, and displayed as distribution on the surface of the sphere. A clustering analysis is performed based on the distributed points inside or on the sphere, to visually understand the expression state of genes for the three types of samples. In addition, the expression level data displayed as points inside or on the sphere are linked as a line or a curve for each gene or for each gene group resulting from the clustering analysis, to visually understand the changes of expression states with time.

Method for displaying gene experiment data

A method for displaying results of hybridization experiments using a biochip is provided. In the method, a plurality of control spots spotted in each of a plurality of sections defined on a biochip is measured. The measured data are plotted on a graph for each section, and all of the graphs are simultaneously displayed on a single screen in the same arrangement as that of the sections on the biochip. By simultaneously displaying all of the graphs on a single screen, it is possible to skim the whole biochip to find experimental errors. Also, experimental errors can be quantified with respect to the dispersion of control data on the basis of the linearity of the data points and slope angles defined for each data points on a graph.

Growing community of inventors

Kanagawa, Japan

Tsunehiko Watanabe