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Articles by Yu-Zhen Fang
Total Records ( 3 ) for Yu-Zhen Fang
  Hua Tang , Xin-Sheng Liu , Yu-Zhen Fang , Li Pan , Zhong-Wang Zhang , Peng Zhou , Jian-Liang Lv , Shou-Tian Jiang , Wen-Fa Hu , Pan Zhang , Yong-Lu Wang and Yong-Guang Zhang
  The Foot-and-mouth Disease (FMD), which is the most devastating disease of livestock husbandry, drastically hinders the development of stock raising. At present the main FMD vaccine is still traditional inactivated vaccine, as its good performance in protective activity and immune efficacy, it is widely used in the world for preventing and controlling this disease, especially in developing countries. However, people have realized many disadvantages of inactivated vaccine. In order to resolve these problems, the scientists are conducting some new research about novel FMD vaccine to seek for more secure and effective vaccines. Nowadays, with the rapid development of molecular biology, researchers are paying high emphasis on novel FMD vaccines, such as, synthetic peptide vaccine, epitope-based vaccine, DNA vaccine, chimeric vaccine and so on. There is no doubt that these new-type FMD vaccines will make great contribution to the prevention and control of FMD. This study reviewed the international research progress on the traditional vaccines and novel vaccines of FMD.
  Hua Tang , Xin-Sheng Liu , Yu-Zhen Fang , Li Pan , Zhong-Wang Zhang , Peng Zhou , Jian-Liang Lv , Shou-Tian Jiang , Wen-Fa Hu , Pan Zhang , Yong-Guang Zhang and Yong-Lu Wang
  The Z-curve is a geometrical tool for visualizing and comparing genomes. Since, the curve contains the information carried by the given sequence, DNA sequences could be analyzed systematically. In this study, the ORF5 gene of Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) was analyzed by the Z-curve method and the DNAstar (DNASTAR Inc.) computer programs. The results revealed by these two methods were identical. The phylogenetic tree is more digitized and the Z-curve method is more picturesque. It turned out to be that, the Z-curve method shows a widely application prospect in phylogenetic relationships analysis. However, the Z-curve method is still in its premature stage. Novel algorithms are expected to be exploited to extract more information involved in the Z-curves.
  Hua Tang , Xin-Sheng Liu , Yu-Zhen Fang , Li Pan , Zong-Wang Zhang , Peng Zhou , Jian-Liang Lv , Shou-Tian Jiang , Yong-Lu Wang and Yong-Guang Zhang
  The Z-curve is a geometrical tool for visualizing and comparing genomes. Since, the curve contains the information carried by the given sequence, DNA sequences could be analyzed systematically. In this study, the Foot and Mouth Disease Virus (FMDV) was analyzed by the Z-curve Method. This research concludes that all serotypes FMDV have a close consanguinity but each has its own characteristic by contrast, the three South African serotypes have a much closer affinity. FMDV have three A + T-rich regions and two G + C-rich regions. The most variable regions of FMDV lie in protein coding areas. And the non-coding region is very conservative. O serotype FMDV is most variable compared with A and Asia1 serotype. Those O serotype FMDV in buffalo and goat have a mutation trend. Compared with host, geographic location have a grater influence on FMDV mutation. The A serotype FMDV strains occurred in India after 2002 are more stable and have a closer phylogenetic relationships compared with the Asia1 strains which were prevalent before 2002. In general, Z-curve Method shows a widely application prospect in the areas of life sciences. Such as gene sequence, molecular epidemiology, homology, evolution, phylogenetic relationships and genetic diversity analysis.
 
 
 
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