This domain appears to play a crucial role in chromatin remodelling for yeast SWI/SNF. It binds histones. It is required for mobilising nucleosomes and lies within the catalytic subunit of the yeast SWI/SNF. It is found to be universally conserved [1].

1: A new, highly conserved domain in Swi2/Snf2 is required for SWI/SNF remodeling. Sen P, Ghosh S, Pugh BF, Bartholomew B; Nucleic Acids Res. 2011;39:9155-9166. PMID:21835776