Physical Biology of the Cell
Rob Philips, Jane Kondev, Julie Theriot, PSU QH 505 .P455 2009
ISBN 978-0-8153-4163-5, about $40 used in 2017
Information dense, very quantitative, a description of the physics and mechanics of cell structures and molecules.
Fig 10.20 Nucleosomes 147 base pairs wrapped around a histone octamer, about 50 base pairs in an intervening linker region.
My question - how much of the DNA is physically accessable for transcription? Could the "junk DNA" be arranged to present active DNA in order of usefulness, perhaps modified by conditions in the cell?