What is the length of Chromatosomal DNA?

[Tyto alba]

I see various sources:
1. Karp- Cell biology
2. some papers
3. Michael M. Cox - https://books.google.co.in/books?id=HmUdBQAAQBAJ&pg=PA338&lpg=PA338&dq=200+bp+or+168+nucleosome&source=bl&ots=TKH1Om-oJc&sig=r3q8RX96zLEtElX5r273jlCDJqY&hl=en&sa=X&ved=0ahUKEwjbm5HbyPLTAhVJuY8KHZkwAGkQ6AEIRzAI#v=onepage&q=200%20bp%20or%20168%20nucleosome&f=false
mention different values for the length of DNA associated with the nucleosomes (Octamer and H1); 168bp and 200bp. I'm a lost. Is there any paper that has settled this confusion once and for all?

 

[Ygggdrasil]

Canonically, the nucleosome core particle wraps 147 bp. Varying studies come up with different numbers protected by the linker histone (H1), for example, see paragraph 6 of http://www.nature.com/nsmb/journal/v5/n12/full/nsb1298_1025.html. A very recent structure of the ncp + linker histone used 197 bp of DNA, so ~200 bp may be the more generally accepted number now: http://www.cell.com/molecular-cell/fulltext/S1097-2765(17)30268-X I do know that there has been controversy over how H1 engages the ncp, and I'm not sure whether the field sees the Mol Cell paper as a definitive answer or if other groups have data in the works to support other structural models.http://www.cell.com/molecular-cell/fulltext/S1097-2765(17)30268-X