organism: Caenorhabditis elegans
attributes.tag: source_name
attributes.value: Mature sperm isolated from adult males
attributes.tag: strain and  genotype
attributes.value: CB1489 him-8(e1489)
attributes.tag: purity of sample
attributes.value: ~99%
attributes.tag: mnase-digestion level
attributes.value: Heavily digested and mono-nucleosome enriched
attributes.tag: cross-linking
attributes.value: Sperm were fixed in 1% formaldehyde for 52 seconds.