Identification of flavonoid 3'-hydroxylase in the yellow flower of Delphinium zalil.

The flowers of delphinium cultivars owe their coloration to anthocyanins such as delphinidin or pelargonidin derivatives. To date, no delphinium cultivars have been found with red flowers due to the presence of cyanidin derivatives. This suggests that delphiniums do not have cyanidin biosynthesis ability because of the loss of function of flavonoid 3' hydroxylase (F3'H).

Architecture of a grid-enabled research platform with location-transparency for bioinformatics.

The recent advance in information technologies has bought about the borderlessness in every field of both science and business. The borderlessness has increasingly made activities in interdisciplinary field more important. This current situation produces a strong demand that people want to establish a virtual group, organization and society for their business and scientific purposes irrespective of the actual structure formed by organizations.

Purification and characterization of two isoforms of glucose 6-phosphate dehydrogenase (G6PDH) from Chlorella vulgaris C-27.

Two kinds of isoforms of glucose 6-phosphate dehydrogenase (G6PDH) were purified from cells of a freezing-tolerant strain, Chlorella vulgaris C-27, by sequential steps of chromatography on five kinds of columns, including a HiTrap Blue column which showed excellent separation of the isoforms from each other. The two isoforms (G6PDH1 and G6PDH2) were purified up to 109-fold and 197-fold with specific activity of 14.4 and 26.

Two low-temperature-inducible Chlorella genes for delta12 and omega-3 fatty acid desaturase (FAD): isolation of delta12 and omega-3 fad cDNA clones, expression of delta12 fad in Saccharomyces cerevisiae, and expression of omega-3 fad in Nicotiana tabacum.

In an attempt to clarify the involvement of fatty acid desaturases (FADs) in the freezing tolerance of Chlorella vulgaris IAM C-27, developed by hardening, we have isolated cDNA clones for two types of FADs from the Chlorella strain, based on the sequence information of genes for delta12 and omega-3 FADs, respectively desaturating oleic acid (18:1) to linoleic acid (18:2) and linoleic acid (18:2) to linolenic acid (18:3). The deduced amino acid sequence of the first clone, designated CvFad2, showed about 66% similarity to the microsomal delta12 FADs from several higher plants and this gene had delta12 FAD activity when expressed in Saccharomyces cerevisiae. The predicted protein encoded by a second gene, designated CvFad3, showed about 60% similarity to the microsomal and plastidial omega-3 FADs from several higher plants.

Cloning and overexpression of Bacillus cereus penicillin-binding protein 3 gene in Escherichia coli.

The pbp3 gene encoding PBP3 of Bacillus cereus was cloned and sequenced. For this purpose, PBP3 was first purified from B. cereus ts-4, and N-terminal amino acid sequences of the peptides obtained from the protease digests of the protein were analyzed.

Polymerase chain reaction assay for detection of Escherichia coli O157: H7 and Escherichia coli O157: H-.

The DNA band patterns generated by polymerase chain reaction (PCR) using the du2 primer and template DNAs from various strains of Escherichia coli and non-E. coli bacteria were compared. Among three to five prominent bands produced, the three bands at about 1.

Rapid Detection of Salmonella spp. in Foods by Combination of a New Selective Enrichment and a Sandwich ELISA Using Two Monoclonal Antibodies against Dulcitol 1-Phosphate Dehydrogenase.

A rapid-detection method was developed for food-borne dulcitol-positive Salmonella spp. in foods that involves a new preenrichment and selective enrichment system and a sandwich ELISA using two monoclonal antibodies against dulcitol 1-phosphate dehydrogenase. Preenrichment and selective enrichment were in Enterobacteriaceae enrichment mannitol (EEM) broth at 42°C for 6 h and in a new dulcitol-magnesium chloride-pyridinesulfonic acid brilliant green-novobiocin (DMPBN) medium at 42°C for 27 h, respectively.

Application of Monoclonal Antibodies to Dulcitol 1-Phosphate Dehydrogenase for Rapid Detection of Salmonella.

Monoclonal antibodies raised against dulcitol 1-phosphate dehydrogenase of Salmonella typhimurium IFO 12529 were screened against 20 serotypes of Salmonella and 13 non- Salmonella bacteria. A sandwich-capture, enzyme-linked immunosorbent assay (sandwich ELISA) was developed for detection of Salmonella in food. The assay utilizes two monoclonal antibodies (DUI2 and DU28) which show no cross-reactions with non- Salmonella bacteria.