Now showing items 1-10 of 23
Purification and properties of glutamate synthase from Bacillus licheniformis
(American Society for Microbiology, 1984-11)
Glutamate synthase [L-glutamate:NADP+ oxidoreductase (transaminating); EC 220.127.116.11] (GItS) was purified to homogeneity from BaciUus licheniformis A5. The native enzyme had a molecular weight of approximately 220,000 and ...
Altered regulation of the glnA gene in glutamine synthetase mutants of Bacillus subtilis
(American Society for Microbiology, 1986-07-01)
Expression of beta-galactosidase by Bacillus subtilis strains carrying transcriptional fusions of the glnA promoter region to the Escherichia coli lacZ gene was found to be regulated by the nitrogen source in glnA+ strains. ...
Regulation of nitrogen catabolic enzymes in Bacillus spp
(American Society for Microbiology, 1982-08)
The levels of the inducible nitrogen catabolic enzymes arginase (L-arginine amidinohydrolase, EC 18.104.22.168) and alanine dehydrogenase (L-alanine:NAD+ oxidoreductase [deaminating], EC 22.214.171.124) from Bacillus licheniformis and ...
Regulation of expression from the glnA promoter of Bacillus subtilis requires the glnA gene product
(American Society for Microbiology, 1985-05)
Expression of the cloned glnA gene [coding for glutamine synthetase (EC 126.96.36.199)] of Bacillus subtilis was 10-fold higher in an Escherichia coli strain grown under nitrogen-limiting conditions than in the same strain under ...
Use of the beta-lactamase inhibitor clavulanic acid in the isolation of auxotrophic mutants of Bacillus licheniformis
(American Society for Microbiology, 1984-08)
The isolation of auxotrophic mutants of Bacillus licheniformis, a microbe containing constitutive ,β-lactamase activity, was found to be facilitated by the addition of clavulanic acid and cefotaxime during enrichment.
Ocular Tracking of Rapidly Moving Visual Targets by Stomatopod Crustaceans
(Company of Biologists, 1988)
1. Ocular tracking in two species of stomatopod crustaceans, Squilla empusa (Say) and Gonodactylus oerstedii (Hansen), was studied by presenting animals with small targets moving to their right and left. 2. Squilla ...
Spectral Sensitivity of Vision in the Mantis Shrimp, Gonodactylus oerstedii, Determined Using Noninvasive Optical Techniques
(The Biological bulletin, 1989-06-01)
Compound eyes of stomatopod crustaceans have many unique design features. Recently developed intracellular optical physiology techniques permit the measurement of spectral sensitivity functions in intact eyes of these ...
Dark regeneration of rhodopsin in crayfish photoreceptors
(The Rockefeller University Press, 1984-07-01)
The eyes of crayfish were exposed to lights of known spectral composition, and the course of regeneration was followed in the dark by measuring the content of rhodopsin and metarhodopsin in single rhabdoms isolated at ...
Fluorescence of crayfish metarhodopsin studied in single rhabdoms
(Elsevier Inc., 1981-09)
Isolated photoreceptor organelles (rhabdoms) from eyes of crayfish (Procambarus. Orconectes) were examined on a microscope system designed for quantitative measurements of fluorescent. Although fully dark-adapted rhabdoms ...
Control of diel vertical migration: Photoresponses of a larval crustacean
(American Society of Limnology and Oceanography, Inc, 1984-01)
The lower threshold for phototaxis of dark‐adapted larvae of the crab Rhithropanopeus harrisii is 10⁻⁷ W·m⁻² at 500‐nm light. This threshold does not change throughout development. In the Newport River estuary (North ...