abnormal nucleosome positioning decreased nucleosome occupancy A cellular process phenotype observed in the vegetative growth phase of the life cycle in which nucleosome occupancy is lower than normal at one or more specific sites. Nucleosome occupancy measures the tendency for DNA in a given region to be packaged into nucleosomes. 2015-03-10T10:36:57Z FYPO:0004491 midori reduced nucleosome occupancy decreased nucleosome occupancy during vegetative growth decreased nucleosome occupancy during mitotic cell cycle