About: http://webisa.webdatacommons.org/203978113

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Their concentration may be low, but they still take part in the reaction, in some cases giving a kind of feedback to the reactants [[19], pp. 312???313].
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov