Centrifugation Application Notes

product line is capable of being integrated with several types of downstream analysis equipment, including microplate readers such as Molecular Devices SpectraMax ® i3 Multi-Mode Detection Platform. This allows researchers to focus on more important matters, such as data analysis and grant writing. Author The author would like to thank Dr. Peixuan Guo, Endowed Chair in Nanobiotechnology, and Zhengyi Zhao at the University of Kentucky College of Pharmacy for kindly providing material and direction. References 1. Guo P X and Lee T J. Viral nanomotors for packaging of dsDNA and dsRNA. Mol. Microbiol. 64; 886–903: (2007). 2. Rao V B and Feiss M. The bacteriophage DNA packaging motor. Annu. Rev. Genet. 42; 647–681: (2008). 3. Guo P, Peterson C and Anderson D. Prohead and DNA-gp3-dependent ATPase activity of the DNA packaging protein gp16 of bacteriophage f29. J. Mol. Biol. 197; 229–236: (1987). 4. Chemla Y R, Aathavan K, Michaelis J, Grimes S, Jardine P J, Anderson D L and Bustamante C. Mechanism of force generation of a viral DNA packaging motor. Cell. 122, 683–692: (2005). 5. Hwang Y, Catalano C E and Feiss M. Kinetic and mutational dissection of the two ATPase activities of terminase, the DNA packaging enzyme of bacteriophage lambda. Biochemistry. 35; 2796–2803: (1996). 6. Sabanayagam C R, Oram M, Lakowicz J R and Black L W. Viral DNA packaging studied by fluorescence correlation spectroscopy. Biophys. J. 93; L17–L19: (2007). Chad Schwartz, PhD, Application Scientist Beckman Coulter, Inc., Indianapolis, IN USA Acknowledgements

7. Guo P, Zhang C, Chen C, Trottier M and Garver K. Inter-RNA interaction of phage phi29 pRNA to form a hexameric complex for viral DNA transportation. Mol. Cell. 2; 149–155: (1998). 8. Schwartz C, Fang H, Huang L and Guo P. Sequential action of ATPase, ATP, ADP, Pi and dsDNA in procapsid-free system to enlighten the mechanism in viral dsDNA packaging. Nucl. Acids Res . 40(6); 2577–2586: (2012). 9. Schwartz C, De Donatis G M, Fang H and Guo P. The ATPase of the phi29 DNA packaging motor is a member of the hexameric AAA+ superfamily. Virology. 443; 20–27: (2013). 10. Schwartz C, De Donatis G M, Zhang H, Fang H and Guo P. Revolution rather than rotation of AAA+ hexameric phi29 nanomotor for viral dsDNA packaging without coiling. Virology. 443; 28–39: (2013). 11. Zhao Z, Khisamutdinov E, Schwartz C and Guo P. Mechanism of one-way traffic of hexameric phi29 DNA packaging motor with four electropositive relaying layers facilitating antiparallel revolution. ACS Nano. 7(5); 4082–4092: (2013). 12. De-Donatis G M, Zhao Z, Wang S, Huang L P, Schwartz C, Tsodikov O, Zhang H, Haque F and Guo P. Finding of widespread viral and bacterial revolution dsDNA translocation motors distinct from rotation motors by channel chirality and size. Cell & Bioscience. 4(30); eCollection 2014: (2014). 13. Guo P, Schwartz C, Haak J and Zhao Z. Discovery of a new motion mechanism of biomotors similar to the earth revolving around the sun without rotation. Virology. 446(0); 133–143: (2013). 14. Schwartz C and Guo P. Ultrastable pRNA hexameric ring gearing hexameric phi29 DNA-packaging motor by revolving without rotating and coiling. Curr Opin Biotechnol. 24(4); 581–590: (2013). 15. Wendell D, Jing P, Geng J, Subramaniam V, Lee T J, Montemagno C and Guo P. Translocation of double stranded DNA through membrane adapted phi29 motor protein nanopore. Nature Nanotechnology. 4(11); 765–72: (2009). 16. Shu D, Shu Y, Haque F, Abdelmawla S and Guo P. Thermodynamically stable RNA three-way junction for constructing multifunctional nanoparticles for delivery of therapeutics. Nature Nanotechnology. 6(10); 658–67: (2011). 17. Khisamutdinov E, Jasinski D and Guo P. RNA as a boiling-resistant anionic polymer material to build robust structures with defined shape and stoichiometry. ACS Nano . 8(5); 4771–81; (2014). 18. Lee T J, Zhang H, Chang C, Savran, C and Guo P. Engineering of the fuorescent-energy-conversion arm of phi29 DNA packaging motor for single- molecule studies. Small . 5(21); 2453–9: (2009).

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