Xiaoshu Xu

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Corynebacterium glutamicum is an important industrial metabolite producer that is difficult to genetically engineer. Although the Streptococcus pyogenes (Sp) CRISPR-Cas9 system has been adapted for genome editing of multiple bacteria, it cannot be introduced into C. glutamicum. Here we report a Francisella novicida (Fn) CRISPR-Cpf1-based genome-editing(More)
Phytosulfokine (PSK) is a tyrosine-sulfated peptide that is widely distributed in plants, participating in cell proliferation, differentiation, and innate immunity. The potential role of PSK in nodulation in legumes has not been reported. In this work, five PSK precursor genes were identified in Lotus japonicas, designated as LjPSK1 to LjPSK5. Three of them(More)
We study how resale affects auctions with costly entry in a model where bidders possess twodimensional private information signals: entry costs and valuations. We establish the existence of symmetric entry equilibrium and identify sufficient conditions under which the equilibrium is unique. Our analysis suggests that the opportunity of resale affects both(More)
We investigate a private value auction in which a single “entrant”on winning imposes a negative externality on two “regular”bidders. In an English auction when all bidders are active, “regular” bidders free ride, exiting before price reaches their values. In a …rst-price sealed-bid auction incentives for free riding and aggressive bidding coexist, limiting(More)
We study how resale affects auctions with costly entry in a model where bidders possess twodimensional private information signals: entry costs and valuations. We establish the existence of symmetric entry equilibrium and identify sufficient conditions under which the equilibrium is unique. Our analysis suggests that the opportunity of resale induces(More)
L-Aspartate-β-semialdehyde dehydrogenase (ASADH) is a key enzyme in the aspartate pathway. In bacteria, ASADH is highly specific for the cofactor NADP(+) rather than NAD(+). Limited information on cofactor utilization is available, and neither the wild-type protein nor the available mutants could utilize NAD(+) efficiently. In this study, we identified(More)
We study a sequential auction of two objects with two bidders, where the winner of the package obtains a synergy from the second object. If reselling after the two auctions occurs, it proceeds as either monopoly or monopsony take-it-or-leave-it offer. We find that a post-auction resale has a significant impact on bidding strategies in the auctions: Under(More)
The symbiotic association between the legume Lotus japonicus and the nitrogen-fixing bacterium Mesorhizobium loti results in the formation of root nodules. This process begins with the recognition of the rhizobial nodulation factor (NF) by the NF receptors (NFR) at the cell surface of the host roots. The downstream signaling cascades after NFR recognition(More)
Figures 1 and 2 shows the …rst drop price against values in the clock auctions for Rs and Es separately, along with the equilibrium bid functions.1 There is a mass of zero, or close to zero, bids on the part of Rs with values in the interval [0, 50] as the theory predicts: R’s with values less than or equal to 50 dropped at or before the clock auction(More)
  • Xiaoshu Xu
  • Journal of Computer Science and Technology
  • 2008
An efficient method for simplifying a multivalued SULM network is presented in this paper. This method employs a cascade decomposition on a multivalued sequential machineM. At first we decomposeM into two simpler machinesM/π andM′. Instead of the traditional normal tree type network, a simpler SULM network that can realizeM can be constructed by(More)