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Adducts of catechols and histidine, which are produced by reactions of 1,2-quinones and p-quinone methides with histidyl residues in proteins incorporated into the insect exoskeleton, were characterized using electrospray ionization mass spectrometry (ESMS), tandem electrospray mass spectrometry (ESMS-MS, collision-induced dissociation), and ion trap mass spectrometry (ITMS). Compounds examined...
Your readers may be interested to hear of our experiences with ear acupuncture, as they may recall the recent letter by Tseng et al describing scalp acupuncture in a 74-year-old patient suffering from phantom limb pain. We used National Acupuncture Detoxification Association (NADA) acupuncture in an adolescent girl suffering from phantom limb pain after hemipelvectomy for osteosarcoma. Positive...
Phase variable expression, mediated by high frequency reversible changes in the length of simple sequence repeats, facilitates adaptation of bacterial populations to changing environments and is frequently important in bacterial virulence. Here we elucidate a novel phase variable mechanism for NadA, an adhesin and invasin of Neisseria meningitidis. The NadR repressor protein binds to operators ...
A crude enzyme preparation from a nadA mutant of Escherichia coli was used to catalyze the conversion of [14C]aspartic acid into a precursor of quinolinic acid, a key intermediate in the biosynthesis of nicotinamide adenine dinucleotide.
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