Michael A A Mathews

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FliN is a component of the bacterial flagellum that is present at levels of more than 100 copies and forms the bulk of the C ring, a drum-shaped structure at the inner end of the basal body. FliN interacts with FliG and FliM to form the rotor-mounted switch complex that controls clockwise-counterclockwise switching of the motor. In addition to its functions(More)
The FliM protein of Escherichia coli is required for the assembly and function of flagella. Genetic analyses and binding studies have shown that FliM interacts with several other flagellar proteins, including FliN, FliG, phosphorylated CheY, other copies of FliM, and possibly MotA and FliF. Here, we examine the effects of a set of linker insertions and(More)
Uroporphyrinogen III synthase, U3S, the fourth enzyme in the porphyrin biosynthetic pathway, catalyzes cyclization of the linear tetrapyrrole, hydroxymethylbilane, to the macrocyclic uroporphyrino gen III, which is used in several different pathways to form heme, siroheme, chlorophyll, F(430) and vitamin B(12). U3S activity is essential in all organisms,(More)
PURPOSE/OBJECTIVES To determine the effect of administering 1.6 ml (480 mcg) of granulocyte colony-stimulating factor (G-CSF) in one subcutaneous injection or two injections of 0.8 ml each. DESIGN Experimental. SETTING 27-bed bone marrow transplant intensive care unit of a metropolitan, university medical center in the southwestern United States. (More)
The efficient production of polyprotonated oligonucleotides, studied at n < or = 19, occurs from water/propan-2-ol solutions over an ammonium acetate concentration range between 2.5 and 40 mm and a pH range from 5 to 11. Average charge-state levels observed were approximately half of those found in mass spectra of polyanionic oligonucleotides, reflecting(More)
We report a new material design concept for synthetic, thermally responsive poly(N-isopropylacrylamide)-based copolymer nanoparticle (NP) hydrogels, which protect proteins from thermal stress. The NP hydrogels bind and protect a target enzyme from irreversible activity loss upon exposure to heat but "autonomously" release the enzyme upon subsequent cooling(More)
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