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Science 19 May 1972:
Vol. 176. no. 4036, pp. 796 - 797
DOI: 10.1126/science.176.4036.796
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Articles

Chromosomal Proteins in the Dinoflagellate Alga Gyrodinium cohnii

Peter J. Rizzo 1 and Larry D. Noodén 1

1 Botany Department, University of Michigan, Ann Arbor 48104

Chromatin has been prepared from nuclei isolated from the dinoflagellate alga Gyrodinium cohnii. This chromatin contains RNA, acid-insoluble proteins, and acid-soluble proteins; the respective ratios to amount of DNA are about 0.09, 0.48, 0.08 (by weight). Not only is the amount of acid-soluble protein associated with the DNA much less than it is in the typical eukaryote, but polyacrylamide gel electrophoresis in urea at pH 3.2 produces a banding pattern different from that of typical histones. There is one predominant band that migrates about as fast as does histone IV from corn. These findings are of interest, because the nuclear organization in the dinoflagellates appears to be intermediate between the prokaryotes and the eukaryotes.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Histone occurrence in chromatin from Peridinium balticum, a binucleate dinoflagellate.
P. Rizzo and E. Cox (1977)
Science 198, 1258-1260
   Abstract »    PDF »
Genetic Recombination in the Dinoflagellate Crypthecodinium cohnii.
R. C. Tuttle, R. C. Tuttle, and A. R. Loeblich III (1974)
Science 185, 1061-1062
   Abstract »    PDF »
Chromosomal Analogues: Long-range Order in {Psi}-Condensed DNA.
L. S. Lehman and S. L. Allen (1974)
Cold Spring Harb Symp Quant Biol 38, 59-73
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)