J. Lynch

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57Fe-enriched ribonucleotide reductase subunit B2 from Escherichia coli strain N6405/pSPS2 has been characterized by Mössbauer and EPR spectroscopy in its native diferric state and in a new differous form. The native protein exhibits two Mössbauer doublets in a 1:1 ratio with parameters that are in excellent agreement with those reported for the wild-type(More)
The active R2 protein of ribonucleotide reductase from Escherichia coli contains a catalytically essential tyrosine radical at position 122 (Tyr122.) that is formed during the reaction of dioxygen with the nearby diiron(II) center. To gain insight into the mode of dioxygen binding, the reaction of the O2 analog NO with the diiron(II) centers of R2red has(More)
— Reconstructions 3D haute résolution de roches et de composites — Des représentations tridimensionnelles de différents milieux ont été obtenues avec une résolution de 10 µm en utilisant un microscanner développé au laboratoire à partir d'une microsonde électronique. Peu de modifications ont été nécessaires. Certains éléments de la microsonde ont même été(More)
We have determined the cleavage site for the restriction endonucleases Ban I (1) and HgiC I to be Identical. Both cleaving the sequence 5'... GiGPyPuCC ...3' leaving a 4 base 5' extension. This is In contrast to Kroger et al (2), who reported the cleavage for HgiC I as 5'...iGGPyPuCC...3' leaVng a 6 base 5'extension. To determine the cleavage site of Ban I(More)
The use of robots for surface methane concentration (SMC) monitoring at municipal solid waste (MSW) landfills has the potential to improve quality of data acquisition for fugitive methane measurement over current practices. Methane concentrations vary significantly, both spatially and temporally, across a MSW landfill. However, current monitoring methods do(More)