PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
6267261-11	1981	Ba2+, Sr2+, Ca2+, Mn2+ and Mg2+ can carry current across the membrane; Ni2+ and Co2+ cannot.	Nickel(2+)	71-75	carbonic anhydrase 2	Homo sapiens	12-15