Naturally occurring and synthetic nucleosome-positioning or nucleosome-repelling sequences used in this study.

The sequences described here were chosen because each has been found to have significant effects on in vivo nucleosome positions and/or in vitro nucleosome affinities, as shown in the rightmost column. The exception is the GC-rich sequence from humans: although its nucleosome affinity has not been directly determined either in vivo or in vitro, it is predicted to correlate with high nucleosome occupancy because of its high G+C content [17] and is occupied by a nucleosome(s) in vivo according to micrococcal nuclease digestion [22]. Two-letter abbreviations given in parentheses under each full sequence name will be used in figure legends in the rest of this work.