attributes.tag: source_name
attributes.value: G1E-ER4+E2 cells
attributes.tag: cell type
attributes.value: ES-derived erythroid progenitor cells
attributes.tag: chip antibody
attributes.value: CTCF (Millipore 07-729)
attributes.tag: average chromatin size in bp as measured between a 100-500 bp window using the agilent bioanalyzer 7500 chip
attributes.value: 221 bp