http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Regulation of the Polarity of Protein Trafficking by Phosphorylation
Anindya Ganguly,조형택,Daisuke Sasayama 한국분자세포생물학회 2012 Molecules and cells Vol.33 No.5
The asymmetry of environmental stimuli and the execu-tion of developmental programs at the organism level require a corresponding polarity at the cellular level, in both unicellular and multicellular organisms. In plants, cell polarity is important in major developmental processes such as cell division, cell enlargement, cell morphogenesis, embryogenesis, axis formation, organ development, and defense. One of the most important factors controlling cell polarity is the asymmetric distribution of polarity determinants. In particular, phosphorylation is implicated in the polar distribution of the determinant protein factors, a mechanism conserved in both prokaryotes and eukaryotes. In plants, formation of local gradients of auxin, the morphogenic hormone, is critical for plant developmental processes exhibiting polarity. The auxin efflux carriers PIN-FORMEDs (PINs) localize asymmetrically in the plasma membrane and cause the formation of local auxin gradients throughout the plant. The asymmetry of PIN distribution in the plasma membrane is determined by phosphorylation-mediated polar trafficking of PIN proteins. This review discusses recent studies on the role of phosphorylation in polar PIN trafficking.
Mori Mori,Sadao Horino,Yuji Inomata,Hiroki Sasayama,Yuko Hirota 대한인간공학회 2007 대한인간공학회 학술대회논문집 Vol.- No.-
In Japan, Quarter-million crossing collisions at intersections accounted for one-fourth of the total accidents in 2005. Three-fourths of collisions took place at urban intersections, more than half of them occurred at uncontrolled intersections. Risks of crossing collisions depend on the quality of visual environment at intersection. This study aimed to assess the legibility and effectiveness of 23 traffic convex mirrors installed at 10 urban intersections, after the road management authority inspected and repaired. The legibility of mirror was assessed by means of the photographs of each mirror taken from the drivers’ viewpoint at a legal stop line, entering from the lower priority direction. “Three ergonomics requirements” suggested by the authors were used as the criteria of legibility assessment; (1) Position of road lane, (2) Blind area and (3) Road surface markings. Combining these 3 criteria, the comprehensive assessment of mirror was indicated in 2-grade scale, such as “Good” or “Poor”, namely so dangerous to be improved. A field assessment revealed that 11 among 23 mirrors were still improperly installed. However, simulation analysis showed that 7 among 11 poor mirrors could be improved by adjusting the angle of mirror plate or displacing mirror plate/poles. In conclusion, the present official guideline in regard with installing mirror should be revised to add newly “three ergonomics requirements” for preventive safety. Application of these new guidelines in practice, a typical low-cost and low technology-oriented improvement to reduce crossing collisions, was highly recommended.