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On Kinetics of Phage Adsorption
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ABSTRACT
Adsorption of λ-phage on sensitive bacteria Escherichia coli is a classical problem but not all issues have been resolved. One of the outstanding problems is the rate of adsorption, which in some cases appears to exceed the theoretical limit imposed by the law of random diffusion. We revisit this problem by conducting experiments along with new theoretical analyses. Our measurements show that upon incubating λ-phage with bacteria Ymel, the population of unbound phage...
Related newspaper, magazine, and journal articles from HighBeam Research
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Regulation of the High-Affinity NO^sub 3^^sup -^ Uptake System by NRT1.1-Mediated NO^sub 3^^sup -^ Demand Signaling in Arabidopsis[W]
Plant Physiology
; The NRT2.1 gene of Arabidopsis thaliana encodes a major component of the root high-affinity NO^sub 3^^sup -^ transport system (HATS) that plays a crucial role in NO^sub 3^^sup -^ uptake by the plant. Although NRT2.1 was known to be induced by NO^sub 3^^sup -^ and feedback repressed by reduced
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POLYHEDRAL MONOCARBABORANE CHEMISTRY. FUNCTIONALITY AND ISOMERISM: REACTIONS OF THE [6-Ph-nido-6-CB^sub 9^H^sub 11^]^sup -^ ANION WITH AMINOPYRIDINES NC^sub 5^H^sub 4^NH^sub 2^ TO YIELD NEUTRAL arachno AND closo TEN-VERTEX MONOCARBABORANE DERIVATIVES
Collection of Czechoslovak Chemical Communications
; Reaction of NC^sub 5^H^sub 4^-2-NH^sub 2^ with the [6-Ph-nido-6-CB^sub 9^H^sub 11sup -^ anion (1) in the presence of hydrated FeCl^sub 3^ gives [6-Ph-9-(NC^sub 5^H^sub 4^-2-NH^sub 2arachno-6-CB^sub 9^H^sub 12^] (4) and thence [1-Ph-2-(NC^sub 5^H^sub 4^-2-NH^sub 2closo-1-CB^sub 9^H^sub 8^] (5), in
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First Evaluation of a ^sup 99m^Tc-Tricarbonyl Complex, ^sup 99m^Tc(CO)^sub 3^(LAN), as a New Renal Radiopharmaceutical in Humans
The Journal of Nuclear Medicine
; ^sup 99m^Tc-Mercaptoacetyltriglycine (^sup 99m^Tc-MAG3), ^sup 99m^Tc-DD- and LL-ethylene-dicysteine (^sup 99m^Tc-EC), and ^sup 99m^Tc-mercaptoacetamide-ethylene-cysteine (^sup 99m^Tc-MAEC) contain N^sub 3^S or N^sub 2^S^sub 2^ ligands designed to accommodate the 4 ligating sites of the (^sup
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Determination of Stereochemistry of Bacteriochlorophyll g^sub F^ and 8^sup 1^-Hydroxy-chlorophyll a^sub F^ from Heliobacterium modesticaldum¶
Photochemistry and Photobiology
; ABSTRACT The reaction center complex of heliobacteria contains three kinds of chlorophyll pigments, bacteriochlorophyll g^sub F^ (BChl g^sub F its 13^sup 2^-epimer BChl g'^sub F^ and 8^sup 1^-hydroxy-chlorophyll a^sub F^ (8^sup 1^-OH-Chl a^sub F Because the full stereochemistry of these naturally
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Gene expression of the NO^sub 3^^sup -^ transporter NRT1.1 and the nitrate reductase NIA1 is repressed in Arabidopsis roots by NO^sub 2^^sup -^, the product of NO^sub 3^^sup -^ reduction
Plant Physiology
; NRT1.1 and NIA1 genes, which encode a nitrate (NO^sub 3^^sup transporter and the minor isoform of NO^sub 3^^sup -^ reductase (NR), respectively, are overexpressed in roots of NR-deficient mutants of Arabidopsis grown on nutrient solution containing NO^sub 3^^sup -^ and reduced N. The
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Synthesis and Biologic Evaluation of a Novel Serotonin 5-HT^sub 1A^ Receptor Radioligand, ^sup 18^F-Labeled Mefway, in Rodents and Imaging by PET in a Nonhuman Primate
The Journal of Nuclear Medicine
; Serotonin 5-HT^sub 1A^ receptors have been implicated in disorders of the central nervous system and, therefore, are being studied by PET. Efforts are under way to improve in vivo stability of 5-HT^sub 1A^ agents currently in human use (^sup 11^C-labeled
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A Thiol-Reactive ^sup 18^F-Labeling Agent, N-[2-(4-^sup 18^F-Fluorobenzamido)Ethyl]Maleimide, and Synthesis of RGD Peptide-Based Tracer for PET Imaging of [alpha]^sub v^[beta]^sub 3^ Integrin Expression
The Journal of Nuclear Medicine
; The cell adhesion molecule integrin α^sub v946;^sub 3^ plays a key role in tumor angiogenesis and metastasis. A series of ^sup 18^F-labeled RGD peptides have been developed for PET of integrin expression based on primary amine-reactive prosthetic groups. In this study we introduced a new
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Synthesis and Evaluation of Nicotine [alpha]^sub 4^[beta]^sub 2^ Receptor Radioligand, 5-(3'-^sup 18^F-Fluoropropyl)-3-(2-(S)-Pyrrolidinylmethoxy)Pyridine, in Rodents and PET in Nonhuman Primate
The Journal of Nuclear Medicine
; Nicotine α^sub 4^4β^sub 2^ receptor subtypes are implicated in the study of Alzheimer's disease, schizophrenia, substance abuse, lung cancer, and other disorders. We report the development and evaluation of a putative antagonist, 5-(3'-fluoropropyl)-3-(2-(S)-pyrrolidinylmethoxy)pyridine
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NH^sub 4^^sup +^ Currents across the Peribacteroid Membrane of Soybean. Macroscopic and Microscopic Properties, Inhibition by Mg^sup 2+^, and Temperature Dependence Indicate a SubpicoSiemens Channel Finely Regulated by Divalent Cations1
Plant Physiology
; The control of ammonium (NH^sub 4^^sup transport is critical in preventing futile cycles of NH^sub 4^^sup ammonia transport. An unusual nonselective cation channel with subpicoSiemens single-channel conductance permeable to NH^sub 4^^sup +^ had previously been identified in the peribacteroid
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Protein-Cofactor Interactions in Bacterial Reaction Centers from Rhodobacter sphaeroides R-26: II. Geometry of the Hydrogen Bonds to the Primary Quinone Q^sup . -^^sub A^ by ^sup 1^H and ^sup 2^H ENDOR Spectroscopy
Biophysical Journal
; ABSTRACT The geometry of the hydrogen bonds to the two carbonyl oxygens of the semiquinone Q^sup sub A^ in the reaction center (RC) from the photosynthetic purple bacterium Rhodobacter sphaeroides R-26 were determined by fitting a spin Hamiltonian to the data derived from ^sup 1^H and ^sup 2^H
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