PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
3654637-4	1987	The ferritin isolated by MgCl2 precipitation has a single subunit of 28 kDa, whereas the ferritin remaining in the supernatant exhibits marked heterogeneity, with a main subunit of 22 kDa.	Magnesium Chloride	25-30	ferritin-1, chloroplastic	Glycine max	4-12