Réponses antivirales chez le moustique Aedes

@article{,

title = {Visualization of RNA crystal growth by atomic force microscopy},

author = {J D Ng and Y G Kuznetsov and A J Malkin and G Keith and R Giege and A McPherson},

url = {http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=9185567},

isbn = {9185567},

year  = {1997},

date = {1997-01-01},

journal = {Nucleic Acids Res},

volume = {25},

number = {13},

pages = {2582-2588},

abstract = {The crystallization of transfer RNA (tRNA) was investigated using atomic force microscopy (AFM) over the temperature range from 4 to 16 degrees C, and this produced the first in situ AFM images of developing nucleic acid crystals. The growth of the (110) face of hexagonal yeast tRNAPhe crystals was observed to occur at steps on vicinal hillocks generated by multiple screw dislocation sources in the temperature range of 13.5-16 degrees C. Two-dimensional nucleation begins to dominate at 13.5 degrees C, with the appearance of three-dimensional nuclei at 12 degrees C. The changes in growth mechanisms are correlated with variations in supersaturation which is higher in the low temperature range. Growth of tRNA crystals was characterized by a strong anisotropy in the tangential step movement and transformation of growth modes on single crystals were directly observed by AFM over the narrow temperature range utilized. Finally, lattice resolution images of the molecular structure of surface layers were recorded. The implications of the strong temperature dependence of tRNAPhe crystal growth are discussed in view of improving and better controlling crystallization of nucleic acids.},

note = {0305-1048 

Journal Article},

keywords = {Atomic Force  RNA, Crystallization  *Microscopy, Fungal/*chemistry  RNA, Non-U.S. Gov't  Temperature, Phe/*chemistry  Saccharomyces cerevisiae/genetics  Support, Transfer, Unité ARN},

pubstate = {published},

tppubtype = {article}

}