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Nucleosomal DNA sequence database.

The database of the nucleosomal DNA sequences presented below is result of screening of large amount of literature since 1978. Each documented case of experimental mapping of the nucleosomes is scrutinized, to extract necessary information on the sequence, nucleosome location and experimental uncertainty of the mapping. The nucleosomal DNA sequences are sorted below in the descending order of experimental mapping accuracy. The database contains 143 nucleosomal DNA sequences from 14 eukaryotes and SV40 virus. Prokaryotic sequences are not included. The references correspond to the papers with original mapping results. The EMBL Nucleotide Sequence Database accession numbers are indicated in Table 1. The nucleosomal center positions as they are claimed in the original papers or deduced from the published data, are given in the Table 1. The actual nucleosomal centers are located within the experimental error bars. In cases when in the original article the accuracy was not indicated, we assigned the error bars on the basis of typical error values for the mapping techniques used. There are six major techniques used for the nucleosomal mapping: