Qinsheng Lu

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Nucleoside diphosphate (NDP) kinase from Escherichia coli was purified to homogeneity and was crystallized. Gel filtration analysis of the purified enzyme indicated that it forms a tetramer. The enzyme was phosphorylated with [gamma-32P]ATP, and the pH stability profile of the phosphoenzyme indicated that two different amino acid residues were(More)
Era, a Ras-like GTP-binding protein in Escherichia coli, has been shown to be essential for growth. However, its cellular functions still remain elusive. In this study, a genetic screening of an E. coli genomic library was performed to identify those genes which can restore the growth ability of a cold-sensitive mutant, Era(Cs) (E200K), at a restrictive(More)
Syncytin-1 is a member of human endogenous retroviral W gene family (HERVW1). Known to be expressed in human placental trophoblast, syncytin-1 protein mediates the fusion of cytotrophoblasts for the formation of syncytiotrophoblasts, the terminally differentiated form of trophoblast lineage. In addition, in vitro studies indicate that syncytin-1 possessed(More)
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