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@article{Daban1982p5771,
	Abstract = {
The role of the histone pairs H2A,H2B and H3,H4 in the kinetics of core particle formation was investigated by using N-(1-pyrene)maleimide-labeled histone H3. The excimer emission intensity of a DNA-core histone complex prepared by direct mixing of DNA and histones in 0.2 -NaCl is reduced by half when H2A,H2B is omitted. Fluorescence quenching studies and lifetime measurements indicate that the emission differences are probably due to static quenching. In a correctly folded nucleosome or a DNA-(H3,H4) complex, the two pyrene rings are buried and are held very close. DNA-(H3,H4) can interact with additional copies of H3,H4, but only when two dimers of H2A,H2B are correctly bound is there a specific twofold increase in excimer emission.
The kinetics of the reaction of H3,H4 with DNA in 0.2 -NaCl were followed by measuring the increase in 460 nm fluorescence. The apparent rate constant of the dominant kinetic component is [small tilde] 2 ◊ 10-1 s-1. If histones H2A,H2B are added immediately after the preparation of the DNA-(H3,H4) complex, an increase in excimer fluorescence is observed, with an apparent rate constant of [small tilde] 6 ◊ 10-3 s-1. However, if histones H2A,H2B are added one hour after DNA-(H3,H4) complex formation, there is no increase in excimer fluorescence. These results suggest that an intermediate involving the H3,H4 tetramer is formed first in nucleosome assembly. In the presence of H2A,H2B, this intermediate evolves to the final folded nucleosome, but in the absence of H2A,H2B it rearranges to an unmaturable dead-end complex. Additional experiments show that a very fast transfer of histone pairs (probably H2A,H2B) can take place between partially reconstituted nucleosomes.},
	Author = {Joan-Ramon Daban and Charles R. Cantor},
	Date-Added = {2010-07-02 00:56:57 +0200},
	Date-Modified = {2010-07-02 00:56:57 +0200},
	Doi = {DOI: 10.1016/0022-2836(82)90141-3},
	Issn = {0022-2836},
	Journal = {{J Mol Biol}},
	Number = {4},
	Pages = {771--789},
	Title = {{Role of histone pairs H2A,H2B and H3,H4 in the self-assembly of nucleosome core particles}},
	Url = {http://www.sciencedirect.com/science/article/B6WK7-4DM29GW-93/2/eed3cac263becb8e8c40850e7ead30a8},
	Volume = {156},
	Year = {1982},
	Bdsk-Url-1 = {http://www.sciencedirect.com/science/article/B6WK7-4DM29GW-93/2/eed3cac263becb8e8c40850e7ead30a8},
	Bdsk-Url-2 = {http://dx.doi.org/10.1016/0022-2836(82)90141-3}}

@article{Daban:1982p5748,
	Author = {Joan-Ramon Daban and Charles R. Cantor},
	Date-Added = {2010-07-02 00:56:48 +0200},
	Date-Modified = {2010-07-02 00:56:48 +0200},
	Journal = {{J Mol Biol}},
	Keywords = {Chickens, Histones, Kinetics, Sodium Chloride, Maleimides, Animals, Electrophoresis: Polyacrylamide Gel, Fluorescent Dyes, Erythrocytes, DNA, Spectrometry: Fluorescence, Nucleic Acid Conformation, Nucleosomes},
	Language = {eng},
	Month = {Jul},
	Number = {4},
	Pages = {749--69},
	Pmid = {7120392},
	Rating = {0},
	Title = {Structural and kinetic study of the self-assembly of nucleosome core particles},
	Volume = {156},
	Year = {1982},
	Bdsk-Url-1 = {http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WK7-4DM29GW-92&_user=1517286&_coverDate=04%252F25%252F1982&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000053449&_version=1&_urlVersion=0&_userid=1517286&md5=17a7b51016f97f29441d9dc19e5ee1b3}}