What marks the difference between the solenoid and the zig-zag models of 30 nm fibres?
ExplanationUnlike the solenoid model, the zig-zag conformation requires the linker DNA to pass through the central axis of the fibre in a relatively straight form. Thus, longer linker DNA favors this conformation. Because the average linker DNA varies between species, the form of the 30 nm fibre may not always be the same.
