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The boundary of the Krein space tracial numerical range, an algebraic approach ...
Bebiano, N.; Nakazato, H.; Nata, A.; Providência, J. daIn this article, tracial numerical ranges associated with matrices in an inde nite inner product space are investigated. The boundary equations of these sets are obtained and the case of the boundary being a polygon is studied. As an application, a numerical algorithm for plotting the tracial numerical range of an arbitrary complex matrix, is presented. Our approach uses the elementary idea that the boundary ma...
Inhibition studies of purple acid phosphatases: implications for the catalytic ...
Elliott,Tristan W.; Mitic,Nataša; Gahan,Lawrence R.; Guddat,Luke W.; Schenk,GerhardPurple acid phosphatases (PAPs) belong to the family of binuclear metallohydrolases and catalyse the hydrolysis of a large group of phosphoester substrates at acidic pH. Despite structural conservation in their active sites PAPs appear to display mechanistic versatility. Here, aspects of the catalytic mechanism of two PAPs are investigated using the inhibitors vanadate and fluoride as probes. While the magnitud...
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