organism: Mus musculus
attributes.tag: source_name
attributes.value: Mouse Liver
attributes.tag: strain
attributes.value: C57BL/6
attributes.tag: sample
attributes.value: mouse: 90%; human spiked DNA (HeLa): 10%
attributes.tag: cell line
attributes.value: HeLa
attributes.tag: age
attributes.value: post natal 12 weeks
attributes.tag: antibody
attributes.value: anti-POLR2B (mouse and humans), Santa Cruz Cat N. SC-67318 (H-201)