Kyoko Yagi

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Tetragenococcus halophila D10 catalyzes the decarboxylation of L-aspartate with nearly stoichiometric release of L-alanine and CO(2). This trait is encoded on a 25-kb plasmid, pD1. We found in this plasmid a putative asp operon consisting of two genes, which we designated aspD and aspT, encoding an L-aspartate-beta-decarboxylase (AspD) and an(More)
We cloned the aspT gene encoding the L-aspartate:L-alanine antiporter AspTCt in Comamonas testosteroni genomic DNA. Analysis of the nucleotide sequence revealed that C. testosteroni has an asp operon containing aspT upstream of the l-aspartate 4-decarboxylase gene, and that the gene order of the asp operon of C. testosteroni is the inverse of that of(More)
In this paper we examine an optimal investment policy of the firm that is financed by issuing equity and debt. Recently, a number of researchers have studied the interaction among firm’s investment and financing decisions under uncertainty by means of real option framework. In the literature, investment problems for a firm with growth options, that is(More)
In this paper we examine an optimal investment policy of the firm, which is financed by issuing equity and debt during a period of time, using real options framework. We examine the effects of the maturity of investment on the values of equity, debt, firm, tax shield and bankruptcy cost. Specifically, we show that the investment timing depends not only on(More)
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