PMID-sentid	Pub_year	Sent_text	compound_name	comp_offset	prot_official_name	organism	prot_offset
21542347-3	2011	It has been shown that the prooxidant action of Ca2+ is related to an abrupt increase (approximately by three orders of magnitude) in the rate constant of comproportionation (reaction of chain branching and formation of o-semiquinonates) and a marked decrease (by two orders of magnitude, from 1.4 10(7) to 0.6 10(5) M(-1)s(-1)) in the rate constant of disproportionation of o-semiquinones.	o-semiquinones	375-389	carbonic anhydrase 2	Homo sapiens	48-51
23143010-11	2012	Only the application of o-semiquinones as spin labels and using the EPR technique made possible to observe and interpret their structure.	o-semiquinones	24-38	spindlin 1	Homo sapiens	42-46
9659366-0	1998	Metabolic activation of dopamine o-quinones to o-semiquinones by NADPH cytochrome P450 reductase may play an important role in oxidative stress and apoptotic effects.	o-semiquinones	47-61	cytochrome p450 oxidoreductase	Homo sapiens	65-96